Cloning this repository:

git clone git://gitorious.org/~bleen/drupal-open-curriculum/bleens-drupal_6_site_building.git bleens-drupal_6_site_building
cd bleens-drupal_6_site_building

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

git remote add bleens-drupal_6_site_building git://gitorious.org/~bleen/drupal-open-curriculum/bleens-drupal_6_site_building.git
git fetch bleens-drupal_6_site_building
git checkout -b my-local-tracking-branch bleens-drupal_6_site_building/master_or_other_branch