t / t5100 / info0005on commit don't ever allow SHA1 collisions to exist by fetching a pack (8685da4)
   1Author: David Kågedal
   2Email: davidk@lysator.liu.se
   3Subject: Fixed two bugs in git-cvsimport-script.
   4Date: Mon, 15 Aug 2005 20:18:25 +0200
   5