On Mon, Jan 03, 2022 at 02:40:06PM +0100, Stefan Sperling wrote:
> You would need to be very lucky in order to reproduce this. The failures
> cannot be easily repeated because timestamps factor into the commit hash.

There are commits in OpenBSD src.git which can be used to trigger it,
such as this one:

commit 0057cee774ad438f8712c4fb8f503de140b5c7c6
Author: mlarkin <mlarkin@openbsd.org>
Date:   Tue Nov 2 23:30:15 2021 +0000

    Remove trailing whitespace