Pulling down the project - aheath05/pythoncms.com GitHub Wiki

You can do this via the terminal

//how to get github and use it https://help.github.com/articles/adding-an-existing-project-to-github-using-the-command-line

Check your existing file structure and compare it to what I have, we should have about the same file structure (give or take a few files).

As long as that is about the same you should (don't quote me) be able to stage your files for commit using the git add command, pull down what I have, and then push. This will create a merge notice. Every commit must have a message otherwise the whole commit is ignored. When you merge and commit all of your files folder that are different will be added to the repo here and we will then be able to pull down any new files or changes you have added to the project.