Cloning this repository:

git clone git://gitorious.org/~dem0n3d/qt-labs/dem0n3ds-qt-opencl.git dem0n3ds-qt-opencl
cd dem0n3ds-qt-opencl

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

git remote add dem0n3ds-qt-opencl git://gitorious.org/~dem0n3d/qt-labs/dem0n3ds-qt-opencl.git
git fetch dem0n3ds-qt-opencl
git checkout -b my-local-tracking-branch dem0n3ds-qt-opencl/master_or_other_branch