Re: [PATCH] Make "git reset" a builtin. (incomplete)

Carlos Rica, Wed, Aug 22, 2007 14:48:16 +0200:

This is the first version of the program "builtin-reset.c",
intended for replacing the script "git-reset.sh".

Very nice code :)

+	obj = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
+	if (!obj)
+		die("Could not parse object '%s'.", rev);
+	memcpy(sha1, obj->sha1, sizeof(sha1));

You might consider using hashcpy