Delete hostname HTTP client DNS cache and close connections to specific IP

I'm using the net/http library to make HTTP requests.

I have a use case where sometimes I resolve a domain name that fronts an Amazon CloudFront distribution. Occasionally for reasons of its own, CloudFront will resolve the DNS to a point of presence (POP) on a different continent, resulting in very high latencies.

When this happens, I want to cause a "targeted reset" making my http.Client "forget" about that POP, basically closing open TCP connections and forcing the DNS for that hostname to be re-resolved.

I'm not able to find a way to force this "targeted reset". My options seem to be:

1. Close all idle connections in the http.Transport using Transport.CloseIdleConnections(), but this will close all TCP connections and it won't do anything about cached DNS results.
2. Construct a whole new http.Client. I've confirmed this does result in re-doing the DNS lookup and it does also create a new connection pool. The downside is it forces re-resolution of all other DNS and force-closes all other TCP connections, even ones I like.

Is there a way to achieve the "targeted reset" (DNS for specific hostnames, TCP connections for specific IP addresses) I've described? I'm happy to use reflection and traverse down into the http.Client implementation to some extent.