$ git clone -n https://src.fedoraproject.org/rpms/ghc-cereal.git /var/lib/mock/f40-build-2055238-49113/root/chroot_tmpdir/scmroot/ghc-cereal
Cloning into '/var/lib/mock/f40-build-2055238-49113/root/chroot_tmpdir/scmroot/ghc-cereal'...
$ git fetch origin d4567cb86224f67d41823d9ba37341923560da8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cereal
 * [new ref]         d4567cb86224f67d41823d9ba37341923560da8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4567cb bump release