This is an old revision of the document!
I have to highly apaupld the WebFaction team for getting this working and making it available to their users. I have been trying with great difficulty to get this working on my own VPS till a friend (and WebFaction customer) told me to take a look here the timing was almost perfect as I had been dealing with this on and off for over three months and was despairing. This combination of Trac and Git alone is prompting me to seriously investigate migrating all my hosting to WebFaction. Well done WF!