Cloning this repository:

git clone git://gitorious.org/merb-book/mainline.git mainline
cd mainline

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

git remote add mainline git://gitorious.org/merb-book/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/~krawek/merb-book/merb-book-es.git merb-book-es
cd merb-book-es

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

git remote add merb-book-es git://gitorious.org/~krawek/merb-book/merb-book-es.git
git fetch merb-book-es
git checkout -b my-local-tracking-branch merb-book-es/master_or_other_branch