Function fetch_pack_with_options 

pub fn fetch_pack_with_options<'a>(
    transport: &mut impl Transport,
    wants: &[ObjectId],
    options: FetchOptions,
    request_storage: &mut [u8],
    response_storage: &'a mut [u8],
) -> Result<&'a [u8]>

Fetch distinct tips in one request. Options must match the advertisement; all wants and the checksummed response use the same object format.