Cloning this repository:

git clone git://gitorious.org/passenger/mainline.git mainline
cd mainline

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

git remote add mainline git://gitorious.org/passenger/mainline.git
git fetch mainline
git checkout -b my-local-tracking-branch mainline/master_or_other_branch

Cloning this repository:

git clone git://gitorious.org/~hernad/passenger/hernads-clone.git hernads-clone
cd hernads-clone

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

git remote add hernads-clone git://gitorious.org/~hernad/passenger/hernads-clone.git
git fetch hernads-clone
git checkout -b my-local-tracking-branch hernads-clone/master_or_other_branch