He keeps calling it octopress, even though that's a blogging engine.
The software is called octogit, and I submitted a pull request to make it not store your password in plaintext months ago that I believe still hasn't been merged.
Sorry for the silly mistake on my part. Post is now corrected!
The HN title is still incorrect, Octopress is that awesome blogging engine (check it out), Octogit the GitHub command line extension. Also, for the Gists check out gist (needs SSL patch) or jist on GH.