From: http://www.programmerq.net/blog/2009/mar/10/accessing-git-through-firewall/
A decent number of things are blocked where I work. SSH is not. I usually use git via SSH. I did want to clone someone's repo that was shared over the git protocol, so I typed in the git-clone command, and waited. It timed out. The quick fix would be to clone it to my home machine, and then clone it over ssh. I never like doing that though, I like origin being the actual origin. I decided that it shouldn't be too hard to get a clone to work, so I did a bit of googling. I figured that if git had any support for a proxy server, it'd be possible one way or another.
