Cloning this repository:

git clone git://gitorious.org/gtk-sharp-me/gtk-sharp-me.git gtk-sharp-me
cd gtk-sharp-me

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

git remote add gtk-sharp-me git://gitorious.org/gtk-sharp-me/gtk-sharp-me.git
git fetch gtk-sharp-me
git checkout -b my-local-tracking-branch gtk-sharp-me/master_or_other_branch