Cloning this repository:

git clone git://gitorious.org/~blozza/firefox-kde-opensuse/firefox-kde-fedora.git firefox-kde-fedora
cd firefox-kde-fedora

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

git remote add firefox-kde-fedora git://gitorious.org/~blozza/firefox-kde-opensuse/firefox-kde-fedora.git
git fetch firefox-kde-fedora
git checkout -b my-local-tracking-branch firefox-kde-fedora/master_or_other_branch