Backup gitosis repositories with rsync?

Question

I have a standard gitosis setup that I would like to backup using rsync. When I try:

rsync -avz [email protected]:/home/git git_origin/

or

rsync -avz --rsync-path 'sudo rsync' 192.168.0.2:/home/git git_origin/

It copes no repository files. Pretty sure it has to do with how the 'git' user has no password and complete ownership of all files in it's /home/git/repositories directory structure. Since you can't 'ssh git' or 'su git' I can't achieve the correct permission level.

So, how do I use rsync to backup all my gitosis repositories?