So it is not an official site. It's just a rewrite of the git.or.cz, to make it cleaner and more user friendly.
P.S. Can someone tell me the correct way to put href attribute in HN?
But I want for example, "GitHub" to be appear as a link with value http://github.com/schacon/learn-github
Much like preventing IMG links helps to keep the site focused on relatively intelligent discussion, rather than spamming, lolcats, rickrolling, and other bulletin board malarkey.