$ git clone -n https://src.fedoraproject.org/rpms/libnetfilter_cthelper.git /var/lib/mock/f45-build-16625-489/root/chroot_tmpdir/scmroot/libnetfilter_cthelper
Cloning into '/var/lib/mock/f45-build-16625-489/root/chroot_tmpdir/scmroot/libnetfilter_cthelper'...
$ git fetch origin 5eb52f0c7016ac02df01f9204963d82630a04152:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libnetfilter_cthelper
 * [new ref]         5eb52f0c7016ac02df01f9204963d82630a04152 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eb52f0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild