Cloning this repository:

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

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

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