struct sha1_array *shallow);
int resolve_remote_symref(struct ref *ref, struct ref *list);
-int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1);
+int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid);
/*
* Remove and free all but the first of any entries in the input list