$ git clone -n https://src.fedoraproject.org/forks/hypersa/rpms/ghc-X11.git /var/lib/mock/f39-build-2218370-52602/root/chroot_tmpdir/scmroot/ghc-X11
Cloning into '/var/lib/mock/f39-build-2218370-52602/root/chroot_tmpdir/scmroot/ghc-X11'...
$ git fetch origin 53fb5762a4160252b9e0bf24e9796a67c584ca11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/hypersa/rpms/ghc-X11
 * [new ref]         53fb5762a4160252b9e0bf24e9796a67c584ca11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53fb576 rv64 rebuild