Subject: Feature request: Add --mtime option to git archive

From: Raul E Rangel <[email-masked]>
Date: Thu, 16 Feb 2023 12:41:42 -0700

When generating a tarball with `git archive <tree>`, `git archive` will
use the current time as the mtime. This results in a non-hermetic
tarball. Could we should add a --mtime option that allows passing in
the time? 

Thanks!