Cloning this repository:

git clone git://gitorious.org/marks-test-project/marks-test-project.git marks-test-project
cd marks-test-project

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

git remote add marks-test-project git://gitorious.org/marks-test-project/marks-test-project.git
git fetch marks-test-project
git checkout -b my-local-tracking-branch marks-test-project/master_or_other_branch