$ git clone -n https://src.fedoraproject.org/rpms/perl-Mail-Transport.git /var/lib/mock/f40-build-2626499-65280/root/chroot_tmpdir/scmroot/perl-Mail-Transport
Cloning into '/var/lib/mock/f40-build-2626499-65280/root/chroot_tmpdir/scmroot/perl-Mail-Transport'...
$ git fetch origin debd4ad1ab5961a29588e915fa36acf9a287dd0c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Mail-Transport
 * [new ref]         debd4ad1ab5961a29588e915fa36acf9a287dd0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at debd4ad Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild