$ git clone -n https://src.fedoraproject.org/rpms/dbus-broker.git /var/lib/mock/f45-build-39633-750/root/chroot_tmpdir/scmroot/dbus-broker
Cloning into '/var/lib/mock/f45-build-39633-750/root/chroot_tmpdir/scmroot/dbus-broker'...
$ git fetch origin 52dedae8f7dff859a84af7aad5bf9eb0d2f554ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dbus-broker
 * [new ref]         52dedae8f7dff859a84af7aad5bf9eb0d2f554ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52dedae Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild