$ git clone -n https://src.fedoraproject.org/rpms/bind.git /var/lib/mock/f42-build-3426580-45197/root/chroot_tmpdir/scmroot/bind
Cloning into '/var/lib/mock/f42-build-3426580-45197/root/chroot_tmpdir/scmroot/bind'...
$ git fetch origin c72c74cce0cd07603de978d0b65b0b93e672ae18:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bind
 * [new ref]         c72c74cce0cd07603de978d0b65b0b93e672ae18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c72c74c Update to 9.16.33 (rhbz#2342784)