how to force a commit date matching info from a mbox ?

Hi list,

I've a big set of patches in a mbox file: there's sufficient info inside for git-am to work.

Yet, each time I do import these, my sha1sums are changing because of different commit dates.

I'd like to force the commit date to match the info/date from the time I received the email (and therefore always get back the right sha1sums).

is this possible ?

There's hundreds of these patches: I'm looking for the right switch or 1 liner trick instead of a long shell script which will import 1 by 1 the patches and force the commit date by environment.

TIA