Problem with git fetch over http://

Hello, I'm using the Builtbot to pull sources from a Git repository, and have found that the Buildbot's Git step always uses git-fetch -- a detail of Buildbot which I currently have little control over.

This is no problem if the git:// protocol is used, but using fetch with http:// doesn't work. This has been mentioned elsewhere:

   http://lists.berlios.de/pipermail/bitbake-dev/2007-November/000765.html

Here's a quick example of what I mean:

   cd /tmp ; mkdir foo ; cd foo ; git init

   git fetch git://newartisans.com/ledger.git	# works fine

   cd /tmp ; rm -fr foo ; mkdir foo ; cd foo ; git init

   git fetch http://newartisans.com/git/ledger.git  # fails

This is happening with git-1.5.5 on the server, Apache 2.2 and git-1.5.5.1 on the client.

Thanks,
   John