Cloning this repository:

git clone git://gitorious.org/~porryfish/maemo-multimedia/porryfishs-gst-plugins-base.git porryfishs-gst-plugins-base
cd porryfishs-gst-plugins-base

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

git remote add porryfishs-gst-plugins-base git://gitorious.org/~porryfish/maemo-multimedia/porryfishs-gst-plugins-base.git
git fetch porryfishs-gst-plugins-base
git checkout -b my-local-tracking-branch porryfishs-gst-plugins-base/master_or_other_branch