files-backend: don't rewrite the `packed-refs` file unnecessarily

diff --git a/archive.c b/archive.c
index 60b3035a7a6a9e7c2e69b4ba7de00ebdf8bfdbb8..557dd2db85ff261ee00ec50ea0bfe286bff7bda3 100644 (file)
--- a/archive.c
+++ b/archive.c
@@ -358,7 +358,7 @@ static void parse_treeish_arg(const char **argv,
                free(ref);
        }
 
-       if (get_sha1(name, oid.hash))
+       if (get_oid(name, &oid))
                die("Not a valid object name");
 
        commit = lookup_commit_reference_gently(&oid, 1);