$ git clone -n https://src.fedoraproject.org/rpms/c2hs.git /var/lib/mock/f40-build-2184799-51282/root/chroot_tmpdir/scmroot/c2hs
Cloning into '/var/lib/mock/f40-build-2184799-51282/root/chroot_tmpdir/scmroot/c2hs'...
$ git fetch origin cda0624f13079f72cba7bd491a4c96a3d9fd7ed9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/c2hs
 * [new ref]         cda0624f13079f72cba7bd491a4c96a3d9fd7ed9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cda0624 import #1993600