$ git clone -n https://src.fedoraproject.org/rpms/rust-ignition-config.git /var/lib/mock/f38-build-side-43-rust-devel-1413717-31445/root/chroot_tmpdir/scmroot/rust-ignition-config
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413717-31445/root/chroot_tmpdir/scmroot/rust-ignition-config'...
$ git fetch origin cd6f795540281e5cf208de205cb610ac571f1946:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ignition-config
 * [new ref]         cd6f795540281e5cf208de205cb610ac571f1946 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd6f795 Update to 0.3.0; regenerate with current rust2rpm