$ git clone -n http://fedora.riscv.rocks:3000/rpms/shim.git /var/lib/mock/f40-staging-825986-154071/root/chroot_tmpdir/scmroot/shim
Cloning into '/var/lib/mock/f40-staging-825986-154071/root/chroot_tmpdir/scmroot/shim'...
$ git fetch origin e0c6c3a5f682c2005a21760122bb6f3cf5b811c5:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/shim
 * [new ref]         e0c6c3a5f682c2005a21760122bb6f3cf5b811c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0c6c3a Update to build for riscv64