Is there a way to copy agent options when using GLOBAL_AGENT_FORCE_GLOBAL_AGENT

[breis-sa]

I would like to use GLOBAL_AGENT_FORCE_GLOBAL_AGENT=true as I want all requests done by my application and third party libraries to go through the proxy. That said, on some particular requests I have an agent explicitly set - mostly because of certificates. What I'm looking for is a way to copy options from the agent explicitly defined in the request to the proxied agent created by global-agent. That way I wouldn't need to disable GLOBAL_AGENT_FORCE_GLOBAL_AGENT. Is there a way to achieve that?