Cloning this repository:

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

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

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