Note - you probably don't want to fork this on Github! If you do it will stay linked to this repository, and then you won't be allowed to fork any more similar projects!
Instead, select Import repository from the + menu at the top right of this page whilst logged in to your GitHub account.
Paste:
https://github.com/Chaste/template_project.git
as the location, give it a personalised name, and click Begin import. This operation should only take a few seconds.
Then see the User Projects guide page on the Chaste wiki for more information.