Cloning this repository:

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

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

git remote add mainline git://gitorious.org/rspec/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/~aslak.hellesoy/rspec/aslaks-build-decoupling.git aslaks-build-decoupling
cd aslaks-build-decoupling

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

git remote add aslaks-build-decoupling git://gitorious.org/~aslak.hellesoy/rspec/aslaks-build-decoupling.git
git fetch aslaks-build-decoupling
git checkout -b my-local-tracking-branch aslaks-build-decoupling/master_or_other_branch