Cloning this repository:

git clone git://gitorious.org/~byrongibson/fugitive/byrongibsons-fugitive.git byrongibsons-fugitive
cd byrongibsons-fugitive

Add this repository as a remote to an existing local repository:

git remote add byrongibsons-fugitive git://gitorious.org/~byrongibson/fugitive/byrongibsons-fugitive.git
git fetch byrongibsons-fugitive
git checkout -b my-local-tracking-branch byrongibsons-fugitive/master_or_other_branch