Function export_chunked 

pub(crate) fn export_chunked(
    repo: &Repo,
    commit: &str,
    ociw: &mut OciDir,
    manifest: &mut ImageManifest,
    imgcfg: &mut ImageConfiguration,
    labels: &mut HashMap<String, String>,
    chunking: Chunking,
    opts: &ExportOpts<'_, '_>,
    description: &str,
) -> Result<()>

Write an ostree commit to an OCI blob