http://flaviocopes.github.com/blog/2012/05/12/howto-create-a-blog-on-github-using-octopress/

You want a blog, right? But not a pussy’s blog, you want a blog you can commit and push to :-)

Then Octopress is the right choice. After hosting my blog on WordPress and Tumblr for years, I just jumped on the Octopress wagon, so for a reference here’s what I did to set it up.