Merge branch 'jh/maint-do-not-track-non-branches'

* jh/maint-do-not-track-non-branches:
  branch/checkout --track: Ensure that upstream branch is indeed a branch

1 files changed, 8 insertions, 3 deletions

diff --git a/branch.c b/branch.c
index dc23e9543..c0c865a4b 100644
--- a/branch.c
+++ b/branch.c
@@ -175,9 +175,14 @@ void create_branch(const char *head,
 			die("Cannot setup tracking information; starting point is not a branch.");
 		break;
 	case 1:
-		/* Unique completion -- good, only if it is a real ref */
-		if (explicit_tracking && !strcmp(real_ref, "HEAD"))
-			die("Cannot setup tracking information; starting point is not a branch.");
+		/* Unique completion -- good, only if it is a real branch */
+		if (prefixcmp(real_ref, "refs/heads/") &&
+		    prefixcmp(real_ref, "refs/remotes/")) {
+			if (explicit_tracking)
+				die("Cannot setup tracking information; starting point is not a branch.");
+			else
+				real_ref = NULL;
+		}
 		break;
 	default:
 		die("Ambiguous object name: '%s'.", start_name);