$ git clone -n https://src.fedoraproject.org/rpms/perl-Email-Stuffer.git /var/lib/mock/f39-build-1435799-32017/root/chroot_tmpdir/scmroot/perl-Email-Stuffer
Cloning into '/var/lib/mock/f39-build-1435799-32017/root/chroot_tmpdir/scmroot/perl-Email-Stuffer'...
$ git fetch origin 9cdfc0e4ca835cf97b01b87340824a9a3aa2f746:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Email-Stuffer
 * [new ref]         9cdfc0e4ca835cf97b01b87340824a9a3aa2f746 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9cdfc0e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild