$ git clone -n https://src.fedoraproject.org/rpms/perl-Mail-Transport.git /var/lib/mock/f39-build-1435320-31984/root/chroot_tmpdir/scmroot/perl-Mail-Transport
Cloning into '/var/lib/mock/f39-build-1435320-31984/root/chroot_tmpdir/scmroot/perl-Mail-Transport'...
$ git fetch origin 2dc3ecdfaee6bf46825ed01a5167e92f90fb61ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Mail-Transport
 * [new ref]         2dc3ecdfaee6bf46825ed01a5167e92f90fb61ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2dc3ecd Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild