How to ignore chars after question mark in URL?

[Reinis Rozitis]

> Is it possible to ignore the presence of the question mark and the rest of the URL?

Yes.
https://www.varnish-cache.org/docs/trunk/faq/general.html

'How do I instruct varnish to ignore the query parameters and only cache one instance of an object?'

sub vcl_recv {
    set req.url = regsub(req.url, "\?.*", "");
}