$ git clone -n http://fedora.riscv.rocks:3000/rpms/compiler-rt.git /var/lib/mock/f40-build-799482-142426/root/chroot_tmpdir/scmroot/compiler-rt
Cloning into '/var/lib/mock/f40-build-799482-142426/root/chroot_tmpdir/scmroot/compiler-rt'...
$ git fetch origin 9b829bc931c449aa4e418de9b4d529c8d505b1ec:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/compiler-rt
 * [new ref]         9b829bc931c449aa4e418de9b4d529c8d505b1ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b829bc Add support for riscv64