$ git clone -n https://src.fedoraproject.org/rpms/ghc-HSH.git /var/lib/mock/f40-build-2185120-51289/root/chroot_tmpdir/scmroot/ghc-HSH
Cloning into '/var/lib/mock/f40-build-2185120-51289/root/chroot_tmpdir/scmroot/ghc-HSH'...
$ git fetch origin 4247eb6e88279d76d673ed3ac3b115af25db3256:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-HSH
 * [new ref]         4247eb6e88279d76d673ed3ac3b115af25db3256 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4247eb6 bump release