There's a group of Green Day fans who are covering some of Green Day's recent songs by reworking them a bit to "Dookiefy" them, changing up the music to make it sound similar to the style of Dookie. You can subscribe their channel on YouTube where they have a total of 12 videos already.

Amy
[youtube=Xsmsc5l6A9Q]

The Forgotten
[youtube=yFDA3LyqKgw]

When It's Time
[youtube=-SWqVupxHpE]

Good Riddance (Time Of Your Life)
[youtube=_HTEsONSas0]