Cloning this repository:

git clone git://gitorious.org/~marknokia/qt-labs/marknokias-scene-graph.git marknokias-scene-graph
cd marknokias-scene-graph

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

git remote add marknokias-scene-graph git://gitorious.org/~marknokia/qt-labs/marknokias-scene-graph.git
git fetch marknokias-scene-graph
git checkout -b my-local-tracking-branch marknokias-scene-graph/master_or_other_branch