git ls-tree --name-only -r refs/notes/many_notes |
while read path
do
	test "$path" = "foobar/non-note.txt" && continue
	test "$path" = "deadbeef" && continue
	test "$path" = "de/adbeef" && continue

	if test $(expr length "$path") -ne $hexsz
	then
		return 1
	fi
done