Merge branch 'jk/fetch-check-graph-objects-fix'

Under a race against another process that is repacking the
repository, especially a partially cloned one, "git fetch" may
mistakenly think some objects we do have are missing, which has
been corrected.

* jk/fetch-check-graph-objects-fix:
  fetch-pack: re-scan when double-checking graph objects

Author: gitster

fetch-pack.c

@@ -143,7 +143,8 @@ static struct commit *deref_without_lazy_fetch(const struct object_id *oid,
 	commit = lookup_commit_in_graph(the_repository, oid);
 	if (commit) {
 		if (mark_tags_complete_and_check_obj_db) {
-			if (!odb_has_object(the_repository->objects, oid, 0))
+			if (!odb_has_object(the_repository->objects, oid,
+					    HAS_OBJECT_RECHECK_PACKED))
 				die_in_commit_graph_only(oid);
 		}
 		return commit;