Cloning this repository:

git clone git://gitorious.org/+mer/fremantle-hildon-desktop/hildon-desktop-mer.git hildon-desktop-mer
cd hildon-desktop-mer

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

git remote add hildon-desktop-mer git://gitorious.org/+mer/fremantle-hildon-desktop/hildon-desktop-mer.git
git fetch hildon-desktop-mer
git checkout -b my-local-tracking-branch hildon-desktop-mer/master_or_other_branch