$ git clone -n https://src.fedoraproject.org/rpms/perl-Number-WithError.git /var/lib/mock/f45-build-25476-611/root/chroot_tmpdir/scmroot/perl-Number-WithError
Cloning into '/var/lib/mock/f45-build-25476-611/root/chroot_tmpdir/scmroot/perl-Number-WithError'...
$ git fetch origin eaf040c8efc55dbfd8e98df13ab43f11f014d3ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Number-WithError
 * [new ref]         eaf040c8efc55dbfd8e98df13ab43f11f014d3ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eaf040c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild