Please make yourself familiar with Git. If you want to mess around while you learn, do so on your own repository.
Here is a good guide for learning Git: https://we.riseup.net/debian/git-development-howto
Questions may be asked here: http://www.reddit.com/r/git/
First, make sure git and all the relevant dependencies are installed on your system.
(Replace username with your GitHub username.)
mkdir hashchan
cd hashchan
git clone git@github.com:username/hashchan.git hashchan
cd hashchan
git branch username
git checkout username
touch first.file
git add -A
git commit -am "My first file commit"
git push