Cloning this repository:

git clone git://gitorious.org/~asimon/testlink-ga/asimons-testlink-code-sandbox.git asimons-testlink-code-sandbox
cd asimons-testlink-code-sandbox

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

git remote add asimons-testlink-code-sandbox git://gitorious.org/~asimon/testlink-ga/asimons-testlink-code-sandbox.git
git fetch asimons-testlink-code-sandbox
git checkout -b my-local-tracking-branch asimons-testlink-code-sandbox/master_or_other_branch