Cloning this repository:

git clone git://gitorious.org/~rain81105/opie/rain81105s-opie.git rain81105s-opie
cd rain81105s-opie

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

git remote add rain81105s-opie git://gitorious.org/~rain81105/opie/rain81105s-opie.git
git fetch rain81105s-opie
git checkout -b my-local-tracking-branch rain81105s-opie/master_or_other_branch