How to clone a project from Github to work on it

http://github.com/guides/getting-a-copy-of-your-github-repo

This works for other people's repositories also, where you have been given access and when you have your public key.

For instance:

git clone git@github.com:scor/rdfx.git

To take a copy of the Drupal project mirrored on github - http://github.com/drupal/drupal - and bring it into your local environment for some good tire-kicking and contrib module development, but not to contribute changes back, you can get a copy of the repository using the public git:// (as opposed to git@) prefix:

git clone git://github.com/drupal/drupal.git 7rdf