as per subject; for now the struct got_object_id is only a wrapper
around the sha1 array, in the future things might change ;-)

diff /home/op/w/got
commit - 3c23f6cdb61cc63d6fd9ecbcc015cd1347793eb1
path + /home/op/w/got
blob - f80d86a8686711ff5888dd6847e0d84b98bc0672
file + lib/object_open_privsep.c
--- lib/object_open_privsep.c
+++ lib/object_open_privsep.c
@@ -446,7 +446,7 @@ got_object_open(struct got_object **obj, struct got_re
 	if (err)
 		return err;
 
-	memcpy((*obj)->id.sha1, id->sha1, SHA1_DIGEST_LENGTH);
+	memcpy(&(*obj)->id, id, sizeof(*id));
 
 	(*obj)->refcnt++;
 	return got_repo_cache_object(repo, id, *obj);