diff --git a/commands/command_migrate.go b/commands/command_migrate.go
index 04f47e6a..2f4f476e 100644
--- a/commands/command_migrate.go
+++ b/commands/command_migrate.go
@@ -179,13 +179,31 @@ func includeExcludeRefs(l *tasklog.Logger, args []string) (include, exclude []st
 		include = append(include, migrateIncludeRefs...)
 		exclude = append(exclude, migrateExcludeRefs...)
 	} else if migrateEverything {
-		localRefs, err := git.LocalRefs()
+		refs, err := git.AllRefsIn("")
 		if err != nil {
 			return nil, nil, err
 		}
 
-		for _, ref := range localRefs {
-			include = append(include, ref.Refspec())
+		for _, ref := range refs {
+			switch ref.Type {
+			case git.RefTypeLocalBranch, git.RefTypeLocalTag,
+				git.RefTypeRemoteBranch, git.RefTypeRemoteTag:
+
+				include = append(include, ref.Refspec())
+			case git.RefTypeOther:
+				parts := strings.SplitN(ref.Refspec(), "/", 3)
+				if len(parts) < 2 {
+					continue
+				}
+
+				switch parts[1] {
+				// The following are GitLab-, GitHub-, VSTS-,
+				// and BitBucket-specific reference naming
+				// conventions.
+				case "merge-requests", "pull", "pull-requests":
+					include = append(include, ref.Refspec())
+				}
+			}
 		}
 	} else {
 		bare, err := git.IsBare()
diff --git a/config/config.go b/config/config.go
index 005d83f0..db261908 100644
--- a/config/config.go
+++ b/config/config.go
@@ -311,8 +311,8 @@ func (c *Configuration) LocalGitStorageDir() string {
 	return c.Filesystem().GitStorageDir
 }
 
-func (c *Configuration) LocalReferenceDir() string {
-	return c.Filesystem().ReferenceDir
+func (c *Configuration) LocalReferenceDirs() []string {
+	return c.Filesystem().ReferenceDirs
 }
 
 func (c *Configuration) LFSStorageDir() string {
@@ -346,7 +346,12 @@ func (c *Configuration) Filesystem() *fs.Filesystem {
 
 	if c.fs == nil {
 		lfsdir, _ := c.Git.Get("lfs.storage")
-		c.fs = fs.New(c.LocalGitDir(), c.LocalWorkingDir(), lfsdir)
+		c.fs = fs.New(
+			c.Os,
+			c.LocalGitDir(),
+			c.LocalWorkingDir(),
+			lfsdir,
+		)
 	}
 
 	return c.fs
diff --git a/config/git_fetcher.go b/config/git_fetcher.go
index f38d468f..3554fc64 100644
--- a/config/git_fetcher.go
+++ b/config/git_fetcher.go
@@ -158,6 +158,7 @@ func keyIsUnsafe(key string) bool {
 }
 
 var safeKeys = []string{
+	"lfs.allowincompletepush",
 	"lfs.fetchexclude",
 	"lfs.fetchinclude",
 	"lfs.gitprotocol",
diff --git a/docs/man/git-lfs-migrate.1.ronn b/docs/man/git-lfs-migrate.1.ronn
index 3af4fe54..9b06b135 100644
--- a/docs/man/git-lfs-migrate.1.ronn
+++ b/docs/man/git-lfs-migrate.1.ronn
@@ -190,8 +190,8 @@ The following configuration:
 
 Would, therefore, include commits: F, E, D, C, B, but exclude commit A.
 
-The presence of flag `--everything` indicates that all local references should be
-migrated.
+The presence of flag `--everything` indicates that all local and remote
+references should be migrated.
 
 ## EXAMPLES
 
@@ -253,16 +253,20 @@ Note: This will require a force push to any existing Git remotes.
 
 ### Migrate without rewriting local history
 
-You can also migrate files without modifying the existing history of your respoitory:
+You can also migrate files without modifying the existing history of your
+repository:
 
 Without a specified commit message:
+
 ```
-    git lfs migrate import --no-rewrite test.zip *.mp3 *.psd
+$ git lfs migrate import --no-rewrite test.zip *.mp3 *.psd
 ```
+
 With a specified commit message:
+
 ```
-    git lfs migrate import --no-rewrite -m "Import .zip, .mp3, .psd files" \
-      test.zip *.mpd *.psd
+$ git lfs migrate import --no-rewrite -m "Import .zip, .mp3, .psd files" \
+  test.zip *.mpd *.psd
 ```
 
 ## SEE ALSO
diff --git a/fs/fs.go b/fs/fs.go
index 8118e2b1..c189ead9 100644
--- a/fs/fs.go
+++ b/fs/fs.go
@@ -1,6 +1,7 @@
 package fs
 
 import (
+	"bufio"
 	"bytes"
 	"fmt"
 	"io/ioutil"
@@ -12,10 +13,19 @@ import (
 	"sync"
 
 	"github.com/git-lfs/git-lfs/tools"
+	"github.com/rubyist/tracerx"
 )
 
 var oidRE = regexp.MustCompile(`\A[[:alnum:]]{64}`)
 
+// Environment is a copy of a subset of the interface
+// github.com/git-lfs/git-lfs/config.Environment.
+//
+// For more information, see config/environment.go.
+type Environment interface {
+	Get(key string) (val string, ok bool)
+}
+
 // Object represents a locally stored LFS object.
 type Object struct {
 	Oid  string
@@ -23,9 +33,9 @@ type Object struct {
 }
 
 type Filesystem struct {
-	GitStorageDir string // parent of objects/lfs (may be same as GitDir but may not)
-	LFSStorageDir string // parent of lfs objects and tmp dirs. Default: ".git/lfs"
-	ReferenceDir  string // alternative local media dir (relative to clone reference repo)
+	GitStorageDir string   // parent of objects/lfs (may be same as GitDir but may not)
+	LFSStorageDir string   // parent of lfs objects and tmp dirs. Default: ".git/lfs"
+	ReferenceDirs []string // alternative local media dirs (relative to clone reference repo)
 	lfsobjdir     string
 	tmpdir        string
 	logdir        string
@@ -105,12 +115,16 @@ func (f *Filesystem) localObjectDir(oid string) string {
 	return filepath.Join(f.LFSObjectDir(), oid[0:2], oid[2:4])
 }
 
-func (f *Filesystem) ObjectReferencePath(oid string) string {
-	if len(f.ReferenceDir) == 0 {
-		return f.ReferenceDir
+func (f *Filesystem) ObjectReferencePaths(oid string) []string {
+	if len(f.ReferenceDirs) == 0 {
+		return nil
 	}
 
-	return filepath.Join(f.ReferenceDir, oid[0:2], oid[2:4], oid)
+	var paths []string
+	for _, ref := range f.ReferenceDirs {
+		paths = append(paths, filepath.Join(ref, oid[0:2], oid[2:4], oid))
+	}
+	return paths
 }
 
 func (f *Filesystem) LFSObjectDir() string {
@@ -159,12 +173,12 @@ func (f *Filesystem) Cleanup() error {
 // New initializes a new *Filesystem with the given directories. gitdir is the
 // path to the bare repo, workdir is the path to the repository working
 // directory, and lfsdir is the optional path to the `.git/lfs` directory.
-func New(gitdir, workdir, lfsdir string) *Filesystem {
+func New(env Environment, gitdir, workdir, lfsdir string) *Filesystem {
 	fs := &Filesystem{
 		GitStorageDir: resolveGitStorageDir(gitdir),
 	}
 
-	fs.ReferenceDir = resolveReferenceDir(fs.GitStorageDir)
+	fs.ReferenceDirs = resolveReferenceDirs(env, fs.GitStorageDir)
 
 	if len(lfsdir) == 0 {
 		lfsdir = "lfs"
@@ -179,19 +193,75 @@ func New(gitdir, workdir, lfsdir string) *Filesystem {
 	return fs
 }
 
-func resolveReferenceDir(gitStorageDir string) string {
-	cloneReferencePath := filepath.Join(gitStorageDir, "objects", "info", "alternates")
-	if tools.FileExists(cloneReferencePath) {
-		buffer, err := ioutil.ReadFile(cloneReferencePath)
-		if err == nil {
-			path := strings.TrimSpace(string(buffer[:]))
-			referenceLfsStoragePath := filepath.Join(filepath.Dir(path), "lfs", "objects")
-			if tools.DirExists(referenceLfsStoragePath) {
-				return referenceLfsStoragePath
+func resolveReferenceDirs(env Environment, gitStorageDir string) []string {
+	var references []string
+
+	envAlternates, ok := env.Get("GIT_ALTERNATE_OBJECT_DIRECTORIES")
+	if ok {
+		splits := strings.Split(envAlternates, string(os.PathListSeparator))
+		for _, split := range splits {
+			if dir, ok := existsAlternate(split); ok {
+				references = append(references, dir)
 			}
 		}
 	}
-	return ""
+
+	cloneReferencePath := filepath.Join(gitStorageDir, "objects", "info", "alternates")
+	if tools.FileExists(cloneReferencePath) {
+		f, err := os.Open(cloneReferencePath)
+		if err != nil {
+			tracerx.Printf("could not open %s: %s",
+				cloneReferencePath, err)
+			return nil
+		}
+		defer f.Close()
+
+		scanner := bufio.NewScanner(f)
+		for scanner.Scan() {
+			text := strings.TrimSpace(scanner.Text())
+			if len(text) == 0 || strings.HasPrefix(text, "#") {
+				continue
+			}
+
+			if dir, ok := existsAlternate(text); ok {
+				references = append(references, dir)
+			}
+		}
+
+		if err := scanner.Err(); err != nil {
+			tracerx.Printf("could not scan %s: %s",
+				cloneReferencePath, err)
+		}
+	}
+	return references
+}
+
+// existsAlternate takes an object directory given in "objs" (read as a single,
+// line from .git/objects/info/alternates). If that is a satisfiable alternates
+// directory (i.e., it exists), the directory is returned along with "true". If
+// not, the empty string and false is returned instead.
+func existsAlternate(objs string) (string, bool) {
+	objs = strings.TrimSpace(objs)
+	if strings.HasPrefix(objs, "\"") {
+		var err error
+
+		unquote := strings.LastIndex(objs, "\"")
+		if unquote == 0 {
+			return "", false
+		}
+
+		objs, err = strconv.Unquote(objs[:unquote+1])
+		if err != nil {
+			return "", false
+		}
+	}
+
+	storage := filepath.Join(filepath.Dir(objs), "lfs", "objects")
+
+	if tools.DirExists(storage) {
+		return storage, true
+	}
+	return "", false
 }
 
 // From a git dir, get the location that objects are to be stored (we will store lfs alongside)
diff --git a/lfs/gitfilter_smudge.go b/lfs/gitfilter_smudge.go
index 0d1c0d1b..b6dc99fc 100644
--- a/lfs/gitfilter_smudge.go
+++ b/lfs/gitfilter_smudge.go
@@ -16,6 +16,18 @@ import (
 
 func (f *GitFilter) SmudgeToFile(filename string, ptr *Pointer, download bool, manifest *tq.Manifest, cb tools.CopyCallback) error {
 	os.MkdirAll(filepath.Dir(filename), 0755)
+
+	if stat, _ := os.Stat(filename); stat != nil && stat.Mode()&0200 == 0 {
+		if err := os.Chmod(filename, stat.Mode()|0200); err != nil {
+			return errors.Wrap(err,
+				"Could not restore write permission")
+		}
+
+		// When we're done, return the file back to its normal
+		// permission bits.
+		defer os.Chmod(filename, stat.Mode())
+	}
+
 	file, err := os.Create(filename)
 	if err != nil {
 		return fmt.Errorf("Could not create working directory file: %v", err)
diff --git a/lfs/lfs.go b/lfs/lfs.go
index eae67ca0..9b4b43dd 100644
--- a/lfs/lfs.go
+++ b/lfs/lfs.go
@@ -35,12 +35,14 @@ func Environ(cfg *config.Configuration, manifest *tq.Manifest) []string {
 
 	fetchPruneConfig := NewFetchPruneConfig(cfg.Git)
 
+	references := strings.Join(cfg.LocalReferenceDirs(), ", ")
+
 	env = append(env,
 		fmt.Sprintf("LocalWorkingDir=%s", cfg.LocalWorkingDir()),
 		fmt.Sprintf("LocalGitDir=%s", cfg.LocalGitDir()),
 		fmt.Sprintf("LocalGitStorageDir=%s", cfg.LocalGitStorageDir()),
 		fmt.Sprintf("LocalMediaDir=%s", cfg.LFSObjectDir()),
-		fmt.Sprintf("LocalReferenceDir=%s", cfg.LocalReferenceDir()),
+		fmt.Sprintf("LocalReferenceDirs=%s", references),
 		fmt.Sprintf("TempDir=%s", cfg.TempDir()),
 		fmt.Sprintf("ConcurrentTransfers=%d", api.ConcurrentTransfers),
 		fmt.Sprintf("TusTransfers=%v", cfg.TusTransfersAllowed()),
@@ -98,13 +100,19 @@ func LinkOrCopyFromReference(cfg *config.Configuration, oid string, size int64)
 	if cfg.LFSObjectExists(oid, size) {
 		return nil
 	}
-	altMediafile := cfg.Filesystem().ObjectReferencePath(oid)
+	altMediafiles := cfg.Filesystem().ObjectReferencePaths(oid)
 	mediafile, err := cfg.Filesystem().ObjectPath(oid)
 	if err != nil {
 		return err
 	}
-	if altMediafile != "" && tools.FileExistsOfSize(altMediafile, size) {
-		return LinkOrCopy(cfg, altMediafile, mediafile)
+	for _, altMediafile := range altMediafiles {
+		tracerx.Printf("altMediafile: %s", altMediafile)
+		if altMediafile != "" && tools.FileExistsOfSize(altMediafile, size) {
+			err = LinkOrCopy(cfg, altMediafile, mediafile)
+			if err == nil {
+				break
+			}
+		}
 	}
-	return nil
+	return err
 }
diff --git a/lfsapi/creds.go b/lfsapi/creds.go
index 4c113b49..2cd3aa0f 100644
--- a/lfsapi/creds.go
+++ b/lfsapi/creds.go
@@ -78,6 +78,14 @@ type AskPassCredentialHelper struct {
 	Program string
 }
 
+type credValueType int
+
+const (
+	credValueTypeUnknown credValueType = iota
+	credValueTypeUsername
+	credValueTypePassword
+)
+
 // Fill implements fill by running the ASKPASS program and returning its output
 // as a password encoded in the Creds type given the key "password".
 //
@@ -86,60 +94,92 @@ type AskPassCredentialHelper struct {
 //
 // If there was an error running the command, it is returned instead of a set of
 // filled credentials.
+//
+// The ASKPASS program is only queried if a credential was not already
+// provided, i.e. through the git URL
 func (a *AskPassCredentialHelper) Fill(what Creds) (Creds, error) {
-	var user bytes.Buffer
-	var pass bytes.Buffer
-	var err bytes.Buffer
-
 	u := &url.URL{
 		Scheme: what["protocol"],
 		Host:   what["host"],
 		Path:   what["path"],
 	}
 
-	// 'ucmd' will run the GIT_ASKPASS (or core.askpass) command prompting
-	// for a username.
-	ucmd := exec.Command(a.Program, a.args(fmt.Sprintf("Username for %q", u))...)
-	ucmd.Stderr = &err
-	ucmd.Stdout = &user
+	creds := make(Creds)
 
-	tracerx.Printf("creds: filling with GIT_ASKPASS: %s", strings.Join(ucmd.Args, " "))
-	if err := ucmd.Run(); err != nil {
+	username, err := a.getValue(what, credValueTypeUsername, u)
+	if err != nil {
 		return nil, err
 	}
+	creds["username"] = username
 
-	if err.Len() > 0 {
-		return nil, errors.New(err.String())
-	}
-
-	if username := strings.TrimSpace(user.String()); len(username) > 0 {
+	if len(username) > 0 {
 		// If a non-empty username was given, add it to the URL via func
 		// 'net/url.User()'.
-		u.User = url.User(username)
+		u.User = url.User(creds["username"])
 	}
 
-	// Regardless, create 'pcmd' to run the GIT_ASKPASS (or core.askpass)
-	// command prompting for a password.
-	pcmd := exec.Command(a.Program, a.args(fmt.Sprintf("Password for %q", u))...)
-	pcmd.Stderr = &err
-	pcmd.Stdout = &pass
-
-	tracerx.Printf("creds: filling with GIT_ASKPASS: %s", strings.Join(pcmd.Args, " "))
-	if err := pcmd.Run(); err != nil {
+	password, err := a.getValue(what, credValueTypePassword, u)
+	if err != nil {
 		return nil, err
 	}
+	creds["password"] = password
+
+	return creds, nil
+}
+
+func (a *AskPassCredentialHelper) getValue(what Creds, valueType credValueType, u *url.URL) (string, error) {
+	var valueString string
+
+	switch valueType {
+	case credValueTypeUsername:
+		valueString = "username"
+	case credValueTypePassword:
+		valueString = "password"
+	default:
+		return "", errors.Errorf("Invalid Credential type queried from AskPass")
+	}
+
+	// Return the existing credential if it was already provided, otherwise
+	// query AskPass for it
+	if given, ok := what[valueString]; ok {
+		return given, nil
+	}
+	return a.getFromProgram(valueType, u)
+}
+
+func (a *AskPassCredentialHelper) getFromProgram(valueType credValueType, u *url.URL) (string, error) {
+	var (
+		value bytes.Buffer
+		err   bytes.Buffer
+
+		valueString string
+	)
+
+	switch valueType {
+	case credValueTypeUsername:
+		valueString = "Username"
+	case credValueTypePassword:
+		valueString = "Password"
+	default:
+		return "", errors.Errorf("Invalid Credential type queried from AskPass")
+	}
+
+	// 'cmd' will run the GIT_ASKPASS (or core.askpass) command prompting
+	// for the desired valueType (`Username` or `Password`)
+	cmd := exec.Command(a.Program, a.args(fmt.Sprintf("%s for %q", valueString, u))...)
+	cmd.Stderr = &err
+	cmd.Stdout = &value
+
+	tracerx.Printf("creds: filling with GIT_ASKPASS: %s", strings.Join(cmd.Args, " "))
+	if err := cmd.Run(); err != nil {
+		return "", err
+	}
 
 	if err.Len() > 0 {
-		return nil, errors.New(err.String())
+		return "", errors.New(err.String())
 	}
 
-	// Finally, now that we have the username and password information,
-	// store it in the creds instance that we will return to the caller.
-	creds := make(Creds)
-	creds["username"] = strings.TrimSpace(user.String())
-	creds["password"] = strings.TrimSpace(pass.String())
-
-	return creds, nil
+	return strings.TrimSpace(value.String()), nil
 }
 
 // Approve implements CredentialHelper.Approve, and returns nil. The ASKPASS
diff --git a/test/test-alternates.sh b/test/test-alternates.sh
new file mode 100755
index 00000000..d60a84e5
--- /dev/null
+++ b/test/test-alternates.sh
@@ -0,0 +1,143 @@
+#!/usr/bin/env bash
+
+. "test/testlib.sh"
+
+begin_test "alternates (single)"
+(
+  set -e
+
+  reponame="alternates-single-alternate"
+  setup_remote_repo_with_file "$reponame" "a.txt"
+
+  pushd "$TRASHDIR" > /dev/null
+    clone_repo "$reponame" "${reponame}_alternate"
+  popd > /dev/null
+
+  rm -rf .git/lfs/objects
+
+  alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
+  echo "$alternate" > .git/objects/info/alternates
+
+  GIT_TRACE=1 git lfs fetch origin master 2>&1 | tee fetch.log
+  [ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
+)
+end_test
+
+begin_test "alternates (multiple)"
+(
+  set -e
+
+  reponame="alternates-multiple-alternates"
+  setup_remote_repo_with_file "$reponame" "a.txt"
+
+  pushd "$TRASHDIR" > /dev/null
+    clone_repo "$reponame" "${reponame}_alternate_stale"
+    rm -rf .git/lfs/objects
+  popd > /dev/null
+  pushd "$TRASHDIR" > /dev/null
+    clone_repo "$reponame" "${reponame}_alternate"
+  popd > /dev/null
+
+  rm -rf .git/lfs/objects
+
+  alternate_stale="$TRASHDIR/${reponame}_alternate_stale/.git/objects"
+  alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
+  echo "$alternate" > .git/objects/info/alternates
+  echo "$alternate_stale" >> .git/objects/info/alternates
+
+  GIT_TRACE=1 git lfs fetch origin master 2>&1 | tee fetch.log
+  [ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
+)
+end_test
+
+begin_test "alternates (commented)"
+(
+  set -e
+
+  reponame="alternates-commented-alternate"
+  setup_remote_repo_with_file "$reponame" "a.txt"
+
+  pushd "$TRASHDIR" > /dev/null
+    clone_repo "$reponame" "${reponame}_alternate"
+  popd > /dev/null
+
+  rm -rf .git/lfs/objects
+
+  alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
+  echo "# $alternate" > .git/objects/info/alternates
+
+  GIT_TRACE=1 git lfs fetch origin master 2>&1 | tee fetch.log
+  [ "1" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
+)
+end_test
+
+begin_test "alternates (quoted)"
+(
+  set -e
+
+  reponame="alternates-quoted-alternate"
+  setup_remote_repo_with_file "$reponame" "a.txt"
+
+  pushd "$TRASHDIR" > /dev/null
+    clone_repo "$reponame" "${reponame}_alternate"
+  popd > /dev/null
+
+  rm -rf .git/lfs/objects
+
+  alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
+  echo "\"$alternate\"" > .git/objects/info/alternates
+
+  GIT_TRACE=1 git lfs fetch origin master 2>&1 | tee fetch.log
+  [ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
+)
+end_test
+
+begin_test "alternates (OS environment, single)"
+(
+  set -e
+
+  reponame="alternates-environment-single-alternate"
+  setup_remote_repo_with_file "$reponame" "a.txt"
+
+  pushd "$TRASHDIR" > /dev/null
+    clone_repo "$reponame" "${reponame}_alternate"
+  popd > /dev/null
+
+  rm -rf .git/lfs/objects
+
+  alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
+
+  GIT_ALTERNATE_OBJECT_DIRECTORIES="$alternate" \
+  GIT_TRACE=1 \
+    git lfs fetch origin master 2>&1 | tee fetch.log
+  [ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
+)
+end_test
+
+begin_test "alternates (OS environment, multiple)"
+(
+  set -e
+
+  reponame="alternates-environment-multiple-alternates"
+  setup_remote_repo_with_file "$reponame" "a.txt"
+
+  pushd "$TRASHDIR" > /dev/null
+    clone_repo "$reponame" "${reponame}_alternate_stale"
+    rm -rf .git/lfs/objects
+  popd > /dev/null
+  pushd "$TRASHDIR" > /dev/null
+    clone_repo "$reponame" "${reponame}_alternate"
+  popd > /dev/null
+
+  rm -rf .git/lfs/objects
+
+  alternate_stale="$TRASHDIR/${reponame}_alternate_stale/.git/objects"
+  alternate="$TRASHDIR/${reponame}_alternate/.git/objects"
+  sep="$(native_path_list_separator)"
+
+  GIT_ALTERNATE_OBJECT_DIRECTORIES="$alternate_stale$sep$alternate" \
+  GIT_TRACE=1 \
+    git lfs fetch origin master 2>&1 | tee fetch.log
+  [ "0" -eq "$(grep -c "sending batch of size 1" fetch.log)" ]
+)
+end_test
diff --git a/test/test-askpass.sh b/test/test-askpass.sh
index 29d3d52d..b41c5451 100755
--- a/test/test-askpass.sh
+++ b/test/test-askpass.sh
@@ -102,3 +102,33 @@ begin_test "askpass: push with SSH_ASKPASS"
   grep "master -> master" push.log
 )
 end_test
+
+begin_test "askpass: defaults to provided credentials"
+(
+  set -e
+
+  reponame="askpass-provided-creds"
+  setup_remote_repo "$reponame"
+  clone_repo "$reponame" "$reponame"
+
+  git lfs track "*.dat"
+  echo "hello" > a.dat
+
+  git add .gitattributes a.dat
+  git commit -m "initial commit"
+
+  # $password is defined from test/cmd/lfstest-gitserver.go (see: skipIfBadAuth)
+  export LFS_ASKPASS_USERNAME="fakeuser"
+  export LFS_ASKPASS_PASSWORD="fakepass"
+  git config --local "credential.helper" ""
+
+  url=$(git config --get remote.origin.url)
+  newurl=${url/http:\/\//http:\/\/user\:pass@}
+  git remote set-url origin "$newurl"
+
+  GIT_ASKPASS="lfs-askpass" GIT_TRACE=1 GIT_CURL_VERBOSE=1 git push origin master 2>&1 | tee push.log
+
+  [ ! $(grep "filling with GIT_ASKPASS" push.log) ]
+  grep "master -> master" push.log
+)
+end_test
diff --git a/test/test-checkout.sh b/test/test-checkout.sh
index cd2633c8..974127b6 100755
--- a/test/test-checkout.sh
+++ b/test/test-checkout.sh
@@ -156,3 +156,29 @@ begin_test "checkout: outside git repository"
   grep "Not in a git repository" checkout.log
 )
 end_test
+
+begin_test "checkout: write-only file"
+(
+  set -e
+
+  reponame="checkout-locked"
+  filename="a.txt"
+
+  setup_remote_repo_with_file "$reponame" "$filename"
+
+  pushd "$TRASHDIR" > /dev/null
+    GIT_LFS_SKIP_SMUDGE=1 clone_repo "$reponame" "${reponame}_checkout"
+
+    chmod -w "$filename"
+
+    refute_file_writeable "$filename"
+    assert_pointer "refs/heads/master" "$filename" "$(calc_oid "$filename\n")" 6
+
+    git lfs fetch
+    git lfs checkout "$filename"
+
+    refute_file_writeable "$filename"
+    [ "$filename" = "$(cat "$filename")" ]
+  popd > /dev/null
+)
+end_test
diff --git a/test/test-env.sh b/test/test-env.sh
index 2a3047e2..cc40e801 100755
--- a/test/test-env.sh
+++ b/test/test-env.sh
@@ -29,7 +29,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -81,7 +81,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -140,7 +140,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -197,7 +197,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -256,7 +256,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -316,7 +316,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -377,7 +377,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=5
 TusTransfers=false
@@ -445,7 +445,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -500,7 +500,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -549,7 +549,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -582,7 +582,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -615,7 +615,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -660,7 +660,7 @@ LocalWorkingDir=
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -739,7 +739,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -772,7 +772,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=false
@@ -838,7 +838,7 @@ LocalWorkingDir=%s
 LocalGitDir=%s
 LocalGitStorageDir=%s
 LocalMediaDir=%s
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=%s
 ConcurrentTransfers=3
 TusTransfers=true
diff --git a/test/test-migrate-fixtures.sh b/test/test-migrate-fixtures.sh
index 627f60f1..bdcd5dce 100755
--- a/test/test-migrate-fixtures.sh
+++ b/test/test-migrate-fixtures.sh
@@ -178,7 +178,7 @@ setup_single_local_branch_tracked_corrupt() {
 #
 # - Commit 'A' has 120, 140 bytes of data in a.txt, and a.md, respectively.
 #
-# - Commit 'B' has 30 bytes of data in a.txt, and includes commit 'A' as a
+# - Commit 'B' has 30 bytes of data in a.md, and includes commit 'A' as a
 #   parent.
 setup_multiple_local_branches() {
   set -e
@@ -218,6 +218,29 @@ setup_multiple_local_branches_with_gitattrs() {
   git commit -m "add .gitattributes"
 }
 
+# setup_multiple_local_branches_non_standard creates a repository as follows:
+#
+#      refs/pull/1/head
+#     /
+#     |
+#     B
+#    / \
+#   A   refs/heads/my-feature
+#   |\
+#   | refs/heads/master
+#    \
+#     refs/pull/1/base
+#
+# With the same contents in 'A' and 'B' as setup_multiple_local_branches.
+setup_multiple_local_branches_non_standard() {
+  set -e
+
+  setup_multiple_local_branches
+
+  git update-ref refs/pull/1/head "$(git rev-parse my-feature)"
+  git update-ref refs/pull/1/base "$(git rev-parse master)"
+}
+
 # setup_multiple_local_branches_tracked creates a repo with exactly the same
 # structure as in setup_multiple_local_branches, but with all files tracked by
 # Git LFS
diff --git a/test/test-migrate-import.sh b/test/test-migrate-import.sh
index 8794b63d..993ad116 100755
--- a/test/test-migrate-import.sh
+++ b/test/test-migrate-import.sh
@@ -763,3 +763,29 @@ begin_test "migrate import (dirty copy, positive answer)"
   assert_local_object "$oid" "5"
 )
 end_test
+
+begin_test "migrate import (non-standard refs)"
+(
+  set -e
+
+  setup_multiple_local_branches_non_standard
+
+  md_oid="$(calc_oid "$(git cat-file -p :a.md)")"
+  txt_oid="$(calc_oid "$(git cat-file -p :a.txt)")"
+  md_feature_oid="$(calc_oid "$(git cat-file -p my-feature:a.md)")"
+
+  git lfs migrate import --everything
+
+  assert_pointer "refs/heads/master" "a.md" "$md_oid" "140"
+  assert_pointer "refs/heads/master" "a.txt" "$txt_oid" "120"
+  assert_pointer "refs/pull/1/base" "a.md" "$md_oid" "140"
+  assert_pointer "refs/pull/1/base" "a.txt" "$txt_oid" "120"
+
+  assert_pointer "refs/heads/my-feature" "a.txt" "$txt_oid" "120"
+  assert_pointer "refs/pull/1/head" "a.txt" "$txt_oid" "120"
+
+  assert_local_object "$md_oid" "140"
+  assert_local_object "$txt_oid" "120"
+  assert_local_object "$md_feature_oid" "30"
+)
+end_test
diff --git a/test/test-worktree.sh b/test/test-worktree.sh
index d49f99a0..d44f1dfb 100755
--- a/test/test-worktree.sh
+++ b/test/test-worktree.sh
@@ -25,7 +25,7 @@ LocalWorkingDir=$(native_path_escaped "$TRASHDIR/$reponame")
 LocalGitDir=$(native_path_escaped "$TRASHDIR/$reponame/.git")
 LocalGitStorageDir=$(native_path_escaped "$TRASHDIR/$reponame/.git")
 LocalMediaDir=$(native_path_escaped "$TRASHDIR/$reponame/.git/lfs/objects")
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=$(native_path_escaped "$TRASHDIR/$reponame/.git/lfs/tmp")
 ConcurrentTransfers=3
 TusTransfers=false
@@ -61,7 +61,7 @@ LocalWorkingDir=$(native_path_escaped "$TRASHDIR/$worktreename")
 LocalGitDir=$(native_path_escaped "$TRASHDIR/$reponame/.git/worktrees/$worktreename")
 LocalGitStorageDir=$(native_path_escaped "$TRASHDIR/$reponame/.git")
 LocalMediaDir=$(native_path_escaped "$TRASHDIR/$reponame/.git/lfs/objects")
-LocalReferenceDir=
+LocalReferenceDirs=
 TempDir=$(native_path_escaped "$TRASHDIR/$reponame/.git/worktrees/$worktreename/lfs/tmp")
 ConcurrentTransfers=3
 TusTransfers=false
diff --git a/test/testhelpers.sh b/test/testhelpers.sh
index b8cdb1e8..71c74afb 100644
--- a/test/testhelpers.sh
+++ b/test/testhelpers.sh
@@ -40,7 +40,7 @@ refute_pointer() {
 
   file=$(git cat-file -p $gitblob)
   version="version https://git-lfs.github.com/spec/v[0-9]"
-  oid="oid sha256:[0-9a-f]\{32\}"
+  oid="oid sha256:[0-9a-f]\{64\}"
   size="size [0-9]*"
   regex="$version.*$oid.*$size"
 
@@ -730,6 +730,16 @@ native_path_escaped() {
   escape_path "$unescaped"
 }
 
+# native_path_list_separator prints the operating system-specific path list
+# separator.
+native_path_list_separator() {
+  if [ "$IS_WINDOWS" -eq 1 ]; then
+    printf ";";
+  else
+    printf ":";
+  fi
+}
+
 cat_end() {
   if [ $IS_WINDOWS -eq 1 ]; then
     printf '^M$'