Cloning this repository:

git clone git://gitorious.org/plasma-mouse-plugins/kdelibs-plasma.git kdelibs-plasma
cd kdelibs-plasma

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

git remote add kdelibs-plasma git://gitorious.org/plasma-mouse-plugins/kdelibs-plasma.git
git fetch kdelibs-plasma
git checkout -b my-local-tracking-branch kdelibs-plasma/master_or_other_branch