add_ref          1264 refs.c         			add_ref(dir, last);
add_ref          1342 refs.c         	add_ref(get_packed_ref_dir(packed_ref_cache),
add_ref          2686 refs.c         		add_ref(cb->packed_refs, packed_entry);
add_ref           622 shallow.c      	head_ref(add_ref, &ca);
add_ref           623 shallow.c      	for_each_ref(add_ref, &ca);
add_ref           657 shallow.c      			head_ref(add_ref, &ca);
add_ref           658 shallow.c      			for_each_ref(add_ref, &ca);