Cloning this repository:

git clone git://gitorious.org/empathy-mallard/empathy-mallard.git empathy-mallard
cd empathy-mallard

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

git remote add empathy-mallard git://gitorious.org/empathy-mallard/empathy-mallard.git
git fetch empathy-mallard
git checkout -b my-local-tracking-branch empathy-mallard/master_or_other_branch