Cloning this repository:

git clone git://git.sugarlabs.org/~ignacio/calculate/irodriguez-calculate-gci2013.git irodriguez-calculate-gci2013
cd irodriguez-calculate-gci2013

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

git remote add irodriguez-calculate-gci2013 git://git.sugarlabs.org/~ignacio/calculate/irodriguez-calculate-gci2013.git
git fetch irodriguez-calculate-gci2013
git checkout -b my-local-tracking-branch irodriguez-calculate-gci2013/master_or_other_branch