$ git clone -n http://fedora.riscv.rocks:3000/rpms/postgresql.git /var/lib/mock/f38-build-side-42-init-devel-1020443-29633/root/chroot_tmpdir/scmroot/postgresql
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1020443-29633/root/chroot_tmpdir/scmroot/postgresql'...
$ git fetch origin bcde5ecff3de5e9977eb1e13ad32563bb8a7aef3:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/postgresql
 * [new ref]         bcde5ecff3de5e9977eb1e13ad32563bb8a7aef3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcde5ec Enable riscv64