In contrast to many other projects, repositories are not hosted on GitHub and are not using Git either. A FAQ has been addressed especially as an explanation to this frequent question.
Instead, projects are hosted using the well known Mercurial source control management which has the benefits of having a sane UX, being portable and simple to use.
Repositories are available for both browsing and cloning at https://hg.malikania.fr.
To clone, simply append the project name. Example:
hg clone https://hg.malikania.fr/nsnake