Cloning this repository:

git clone git://gitorious.org/maemo-5-certificate-manager/maemo-security-certman-applet.git maemo-security-certman-applet
cd maemo-security-certman-applet

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

git remote add maemo-security-certman-applet git://gitorious.org/maemo-5-certificate-manager/maemo-security-certman-applet.git
git fetch maemo-security-certman-applet
git checkout -b my-local-tracking-branch maemo-security-certman-applet/master_or_other_branch