$ git clone -n https://src.fedoraproject.org/rpms/ghc-monad-par.git /var/lib/mock/f39-build-1716585-41229/root/chroot_tmpdir/scmroot/ghc-monad-par
Cloning into '/var/lib/mock/f39-build-1716585-41229/root/chroot_tmpdir/scmroot/ghc-monad-par'...
$ git fetch origin 86d5475046aa4bcb5c4bf6889963a566b157dc90:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-monad-par
 * [new ref]         86d5475046aa4bcb5c4bf6889963a566b157dc90 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86d5475 bump release