GitHub provides several timeline resources in Atom format. The Feeds API lists all the feeds available to the authenticating user:

Timeline: The GitHub global public timeline User: The public timeline for any user, using URI template Current user public: The public timeline for the authenticated user Current user: The private timeline for the authenticated user Current user actor: The private timeline for activity created by the authenticated user Current user organizations: The private timeline for the organizations the authenticated user is a member of. Note: Private feeds are only returned when authenticating via Basic Auth since current feed URIs use the older, non revokable auth tokens.

Example

Tentacat.Users.Feeds

More info at: https://developer.github.com/v3/activity/feeds/