$ git clone -n https://src.fedoraproject.org/rpms/ghc-Stream.git /var/lib/mock/f41-build-838890-159867/root/chroot_tmpdir/scmroot/ghc-Stream
Cloning into '/var/lib/mock/f41-build-838890-159867/root/chroot_tmpdir/scmroot/ghc-Stream'...
$ git fetch origin 092bf083e57be833dfe9099a5cf5a14476d85252:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-Stream
 * [new ref]         092bf083e57be833dfe9099a5cf5a14476d85252 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 092bf08 bump release