never run aggressive

[wuputah]

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/

[tt]

Should we perhaps leave it as a flag? Perhaps the arguments to heroku repo:gc would just be passed to git gc. Then you'd also be able to set --prune, if you wanted to.

[wuputah]

Perhaps, but I don't know how to do that. In any case, I think the most sane default is definitely not --aggressive.

[lstoll]

I'd definitely say drop the --agressive by default. I originally did this for a handful of specific people who were doing very Dumb Things with their repos, who needed a crazy level of fixing. The general case should be a normal GC. I do like the idea of just passing through args to the git gc command, sounds neat and way more flexible.