Cloning this repository:

git clone git://gitorious.org/~bobu31/gammu/bobu31s-bobu31s-gsm-docs.git bobu31s-bobu31s-gsm-docs
cd bobu31s-bobu31s-gsm-docs

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

git remote add bobu31s-bobu31s-gsm-docs git://gitorious.org/~bobu31/gammu/bobu31s-bobu31s-gsm-docs.git
git fetch bobu31s-bobu31s-gsm-docs
git checkout -b my-local-tracking-branch bobu31s-bobu31s-gsm-docs/master_or_other_branch