Cloning this repository:

git clone git://gitorious.org/ocs_rails/ocs_rails.git ocs_rails
cd ocs_rails

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

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