gc.pruneexpire::
When 'git-gc' is run, it will call 'prune --expire 2.weeks.ago'.
- Override the grace period with this config variable.
+ Override the grace period with this config variable. The value
+ "now" may be used to disable this grace period and always prune
+ unreachable objects immediately.
gc.reflogexpire::
'git-reflog expire' removes reflog entries older than