Cloning this repository:

git clone git://gitorious.org/~ninochip/qt-labs/ninochips-devdays-graphicssystem-plugin.git ninochips-devdays-graphicssystem-plugin
cd ninochips-devdays-graphicssystem-plugin

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

git remote add ninochips-devdays-graphicssystem-plugin git://gitorious.org/~ninochip/qt-labs/ninochips-devdays-graphicssystem-plugin.git
git fetch ninochips-devdays-graphicssystem-plugin
git checkout -b my-local-tracking-branch ninochips-devdays-graphicssystem-plugin/master_or_other_branch