heroku/heroku-repo — pull request #18 by wuputah (2013-12-17 23:45:00+00:00)
Title: never run aggressive

aggressive is a very intensive and most likely unneeded task that is
unlikely to finish in a dyno. for more on aggressive, see:
http://metalinguist.wordpress.com/2007/12/06/the-woes-of-git-gc-aggressive-and-how-git-deltas-work/