$ git clone -n http://fedora.riscv.rocks:3000/rpms/shim.git /var/lib/mock/f40-staging-825981-154071/root/chroot_tmpdir/scmroot/shim
Cloning into '/var/lib/mock/f40-staging-825981-154071/root/chroot_tmpdir/scmroot/shim'...
$ git fetch origin 4ee694f28f2fcc58cd835f37dcf44184f8c8bbee:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/shim
 * [new ref]         4ee694f28f2fcc58cd835f37dcf44184f8c8bbee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ee694f Update to build for riscv64