t: be explicit about the branch we're pulling from

When we invoke "git pull", be explicit about where we're pulling from.
Git will set some default values for us, but if we want to support a
branch name that isn't the default, we need to be explicit.

t/t-batch-transfer.sh

@@ -57,7 +57,7 @@ begin_test "batch transfer"
   # change to the clone's working directory
   cd ../clone
 
-  git pull
+  git pull origin master
 
   [ "a" = "$(cat a.dat)" ]
 

t/t-chunked-transfer-encoding.sh

@@ -56,7 +56,7 @@ begin_test "chunked transfer encoding"
   # change to the clone's working directory
   cd ../clone
 
-  git pull 2>&1
+  git pull origin master 2>&1
 
   [ "a" = "$(cat a.dat)" ]
 

t/t-fetch.sh

@@ -515,7 +515,7 @@ begin_test "fetch with no origin remote"
   cd ../no-remote-clone
 
   # pull commits & lfs
-  git pull 2>&1
+  git pull origin master 2>&1
   assert_local_object "$contents_oid" 1
 
   # now checkout detached HEAD so we're not tracking anything on remote

t/t-happy-path.sh

@@ -56,7 +56,7 @@ begin_test "happy path"
   # change to the clone's working directory
   cd ../clone
 
-  git pull
+  git pull origin master
 
   [ "a" = "$(cat a.dat)" ]
 

t/t-reference-clone.sh

@@ -84,7 +84,7 @@ begin_test "fetch from clone reference"
   delete_server_object "$reponame" "$oid"
 
   cd "$repo_dir"
-  GIT_LFS_SKIP_SMUDGE=1 git pull
+  GIT_LFS_SKIP_SMUDGE=1 git pull origin master
   git lfs pull
 
   assert_pointer "master" "a.dat" "$oid" 1