$ git clone -n https://src.fedoraproject.org/rpms/bugzilla.git /var/lib/mock/f45-build-4209-331/root/chroot_tmpdir/scmroot/bugzilla
Cloning into '/var/lib/mock/f45-build-4209-331/root/chroot_tmpdir/scmroot/bugzilla'...
$ git fetch origin 16c7efa37b9de161b725aa3c83410ba1af74f735:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bugzilla
 * [new ref]         16c7efa37b9de161b725aa3c83410ba1af74f735 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16c7efa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild