Cloning this repository:

git clone git://gitorious.org/maemo-gnome-essentials/shared-mime-info.git shared-mime-info
cd shared-mime-info

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

git remote add shared-mime-info git://gitorious.org/maemo-gnome-essentials/shared-mime-info.git
git fetch shared-mime-info
git checkout -b my-local-tracking-branch shared-mime-info/master_or_other_branch