Function http_protocol_v2_fetch_response 

pub fn http_protocol_v2_fetch_response<C: HttpClient + ?Sized>(
    client: &C,
    remote: &RemoteUrl,
    format: ObjectFormat,
    handshake: &TransportHandshake,
    fetch: ProtocolV2FetchRequest,
    credentials: &mut dyn CredentialProvider,
    config: Option<&GitConfig>,
) -> Result<Vec<ProtocolV2FetchResponseSection>>

Post a protocol v2 fetch RPC with wants/haves/shallow/deepen and read back the sectioned response. Authenticates and validates status. When the server advertises sideband-all, the request and response use the sideband-all wire form.