$ git clone -n https://src.fedoraproject.org/rpms/hnb.git /var/lib/mock/f45-build-13466-451/root/chroot_tmpdir/scmroot/hnb
Cloning into '/var/lib/mock/f45-build-13466-451/root/chroot_tmpdir/scmroot/hnb'...
$ git fetch origin 41fa68cae8a3505d45c0c484f661ab7531525e7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hnb
 * [new ref]         41fa68cae8a3505d45c0c484f661ab7531525e7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41fa68c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild