def fetch_page(base_url, page, session):
    """
    Fetch a particular page number for a GitHub API resource.

    :param unicode base_url: the URL of the GitHub API resource.
    :param int page: the page number to request (0 indexed).
    :param requests.Session session: the requests Session to use for
        the request.
    :return dict: The deserialized response content from GitHub.
    """
    return session.get(base_url + "?page={}".format(page)).json()