diff --git a/lfs/lfs.go b/lfs/lfs.go
index d293d4b5..c76a0b44 100644
--- a/lfs/lfs.go
+++ b/lfs/lfs.go
@@ -113,6 +113,13 @@ func init() {
 }
 
 func resolveGitDir() (string, string, error) {
+	gitDir := Config.Getenv("GIT_DIR")
+	workTree := Config.Getenv("GIT_WORK_TREE")
+
+	if gitDir != "" {
+		return processGitDirVar(gitDir, workTree)
+	}
+
 	wd, err := os.Getwd()
 	if err != nil {
 		return "", "", err
@@ -121,6 +128,24 @@ func resolveGitDir() (string, string, error) {
 	return recursiveResolveGitDir(wd)
 }
 
+func processGitDirVar(gitDir, workTree string) (string, string, error) {
+	if workTree != "" {
+		return workTree, gitDir, nil
+	}
+
+	// See `core.worktree` in `man git-config`:
+	// “If --git-dir or GIT_DIR is specified but none of --work-tree, GIT_WORK_TREE and
+	// core.worktree is specified, the current working directory is regarded as the top
+	// level of your working tree.”
+
+	wd, err := os.Getwd()
+	if err != nil {
+		return "", "", err
+	}
+
+	return wd, gitDir, nil
+}
+
 func recursiveResolveGitDir(dir string) (string, string, error) {
 	var cleanDir = filepath.Clean(dir)
 	if cleanDir[len(cleanDir)-1] == os.PathSeparator {