Get most recent commit for every repo the user has access to.

commits.py

    from github import Github
    from datetime import datetime

    g = Github("user", "pass")

    since = datetime(2014, 1, 1)

    for org in g.get_user().get_orgs():
        print org.name

        for repo in org.get_repos():

            commit = ''
            commits = repo.get_commits(since=since).get_page(0)
            if commits:
                commit = commits[0].sha
            print u'|-  {0} ({1})'.format(repo.name, commit)