$ git clone -n http://fedora.riscv.rocks:3000/rpms/rust.git /var/lib/mock/f41-build-812371-147815/root/chroot_tmpdir/scmroot/rust
Cloning into '/var/lib/mock/f41-build-812371-147815/root/chroot_tmpdir/scmroot/rust'...
$ git fetch origin e53c9e498bd8c805011ae4dd73ac0d753cb1e7a2:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/rust
 * [new ref]         e53c9e498bd8c805011ae4dd73ac0d753cb1e7a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e53c9e4 Gold linker doesn't support riscv64