Cloning this repository:

git clone git://git.sugarlabs.org/~rbuj/turtleart-extras/catalan-turtleart-extras.git catalan-turtleart-extras
cd catalan-turtleart-extras

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

git remote add catalan-turtleart-extras git://git.sugarlabs.org/~rbuj/turtleart-extras/catalan-turtleart-extras.git
git fetch catalan-turtleart-extras
git checkout -b my-local-tracking-branch catalan-turtleart-extras/master_or_other_branch