$ git clone -n http://fedora.riscv.rocks:3000/rpms/rust.git /var/lib/mock/f38-build-721740-98671/root/chroot_tmpdir/scmroot/rust
Cloning into '/var/lib/mock/f38-build-721740-98671/root/chroot_tmpdir/scmroot/rust'...
$ git fetch origin 1925604d7c181f94473fee26a56cb1aa47096f46:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/rust
 * [new ref]         1925604d7c181f94473fee26a56cb1aa47096f46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1925604 Merge remote-tracking branch 'up/f38' into f38-riscv64