$ git clone -n https://src.fedoraproject.org/rpms/rpmbuild-order.git /var/lib/mock/f40-build-743943-111445/root/chroot_tmpdir/scmroot/rpmbuild-order
Cloning into '/var/lib/mock/f40-build-743943-111445/root/chroot_tmpdir/scmroot/rpmbuild-order'...
$ git fetch origin dd4497f4ab975128645b14df023409633c6cd66d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpmbuild-order
 * [new ref]         dd4497f4ab975128645b14df023409633c6cd66d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd4497f bump release