Use already created scope for Notification#latest
No longer need to check against Git type

Since we are only supporting Github, just take off the extra conditional
Need to freeze time today's commit list
Remove seeminly vestigal code

As I do not have the full Git history to go off of, this seems to be
reminicent of either old GitHub API weirdness or Springloops stuff.

@calebwoods, as you were likely the original author, would you leave a
comment to this affect. Based on my seaching around GitHub's API, we
should never have a singular `{ "commit": [] }` result.