Cloning this repository:

git clone git://gitorious.org/~encrypsis/android-n900/encrypsiss-kernel-ng-irrelevant.git encrypsiss-kernel-ng-irrelevant
cd encrypsiss-kernel-ng-irrelevant

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

git remote add encrypsiss-kernel-ng-irrelevant git://gitorious.org/~encrypsis/android-n900/encrypsiss-kernel-ng-irrelevant.git
git fetch encrypsiss-kernel-ng-irrelevant
git checkout -b my-local-tracking-branch encrypsiss-kernel-ng-irrelevant/master_or_other_branch