$ git clone -n https://src.fedoraproject.org/rpms/ghc-quickcheck-io.git /var/lib/mock/f40-build-742939-110991/root/chroot_tmpdir/scmroot/ghc-quickcheck-io
Cloning into '/var/lib/mock/f40-build-742939-110991/root/chroot_tmpdir/scmroot/ghc-quickcheck-io'...
$ git fetch origin 923fc28fc8d161da8d8f68f1a13166e4073a8f83:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-quickcheck-io
 * [new ref]         923fc28fc8d161da8d8f68f1a13166e4073a8f83 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 923fc28 bump release