From: Sam Vilain <sam@vilain.net>
Date: Sun, 20 Jun 2010 08:31:04 GMT
Subject: Suggested command in git-filter-branch(1)
Message-ID: <1277022664.3728.1.camel@denix>

+* Remove the original refs backed up by git-filter-branch: say `git
+  for-each-ref \--format="%(refname)" refs/original/ | xargs -n 1 git
+  update-ref -d`.

This is sick.  I would normally just tell people to use 'rm
-rf .git/refs/original', if for some bizarre reason gc has packed
the .refs/original refs then I might do something like the above or
edit .git/packed-refs

How about 'git update-ref -dr refs/original' (and making that work) ?

Sam