$ git clone -n http://fedora.riscv.rocks:3000/rpms/mlir.git /var/lib/mock/f41-build-855706-167318/root/chroot_tmpdir/scmroot/mlir
Cloning into '/var/lib/mock/f41-build-855706-167318/root/chroot_tmpdir/scmroot/mlir'...
$ git fetch origin 0be293ffd3003ddd38853ffa04dab64b61ce0cf7:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/mlir
 * [new ref]         0be293ffd3003ddd38853ffa04dab64b61ce0cf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0be293f Add support for riscv64