$ git clone -n https://src.fedoraproject.org/rpms/ghc-RSA.git /var/lib/mock/f39-build-2167486-50997/root/chroot_tmpdir/scmroot/ghc-RSA
Cloning into '/var/lib/mock/f39-build-2167486-50997/root/chroot_tmpdir/scmroot/ghc-RSA'...
$ git fetch origin b1c25d76b27e6c80654b9805179e42e75497cb09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-RSA
 * [new ref]         b1c25d76b27e6c80654b9805179e42e75497cb09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1c25d7 bump release