bash: complete *_HEAD refs if present

diff --git a/builtin-merge-base.c b/builtin-merge-base.c
index a6ec2f7ab76db27afbb63aacf3bba60b4e73b3f6..54e7ec22370ce63150ddc93ebe252bea09f5064a 100644 (file)
--- a/builtin-merge-base.c
+++ b/builtin-merge-base.c
@@ -23,7 +23,7 @@ static int show_merge_base(struct commit **rev, int rev_nr, int show_all)
 }
 
 static const char * const merge_base_usage[] = {
-       "git merge-base [--all] <commit-id> <commit-id>...",
+       "git merge-base [-a|--all] <commit> <commit>...",
        NULL
 };