Cloning this repository:

git clone git://gitorious.org/android-on-freerunner/platform_system_bluetooth.git platform_system_bluetooth
cd platform_system_bluetooth

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

git remote add platform_system_bluetooth git://gitorious.org/android-on-freerunner/platform_system_bluetooth.git
git fetch platform_system_bluetooth
git checkout -b my-local-tracking-branch platform_system_bluetooth/master_or_other_branch