$ git clone -n https://src.fedoraproject.org/rpms/ghc-http-types.git /var/lib/mock/f40-build-742736-110881/root/chroot_tmpdir/scmroot/ghc-http-types
Cloning into '/var/lib/mock/f40-build-742736-110881/root/chroot_tmpdir/scmroot/ghc-http-types'...
$ git fetch origin 669e961499a8a61b53b5969e07fbdd4d8bb5e1aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-http-types
 * [new ref]         669e961499a8a61b53b5969e07fbdd4d8bb5e1aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 669e961 bump release