Saving headers when changing url

Hello, here is the problem.

I need fetch other site saving original headers, so when I put

const resp = await fetch(event.request);

all working fine, when I change to

const resp = await fetch(""); 

all my initial headers is lost.

I understand that I need to copy initial headers like described in … /workers//runtime-apis/request#requestinit but don’t have idea how to do it, because

const newRequestInit = {
    headers: event.request.headers

or similar - not working, or I doing something wrong

How I can transfer all old headers to now request?

Just pass the original request to the RequestInit of the fetch.

const resp = await fetch("", request);
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