$ git clone -n https://src.fedoraproject.org/rpms/ghc-word8.git /var/lib/mock/f41-build-838850-159865/root/chroot_tmpdir/scmroot/ghc-word8
Cloning into '/var/lib/mock/f41-build-838850-159865/root/chroot_tmpdir/scmroot/ghc-word8'...
$ git fetch origin 65ef1d1c70dc42bad6eed3b9a9e02e12d701eac2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-word8
 * [new ref]         65ef1d1c70dc42bad6eed3b9a9e02e12d701eac2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65ef1d1 bump release