Cloning this repository:

git clone git://gitorious.org/google-album-art-downloader/google-album-art-downloader.git google-album-art-downloader
cd google-album-art-downloader

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

git remote add google-album-art-downloader git://gitorious.org/google-album-art-downloader/google-album-art-downloader.git
git fetch google-album-art-downloader
git checkout -b my-local-tracking-branch google-album-art-downloader/master_or_other_branch