Cloning this repository:

git clone git://gitorious.org/webkit-efl/webkit-efl.git webkit-efl
cd webkit-efl

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

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