|git-annex-enable-tor(1)||General Commands Manual||git-annex-enable-tor(1)|
sudo git annex enable-tor $(id -u)
It modifies /etc/tor/torrc to register the hidden service. If run as a normal user, it will try to use sudo/su/etc to get root access to modify that file. If you run it as root, pass it your non-root user id number, as output by id -u
After this command is run, git annex remotedaemon can be run to serve the tor hidden service, and then git-annex p2p --gen-address can be run to give other users access to your repository via the tor hidden service.