$ node
Welcome to Node.js v18.13.0.
Type ".help" for more information.
> const { fetch } = require('undici');
undefined
> await fetch("https://bing.com/translator", { headers: { host: 'bing.com' } });
Uncaught TypeError: fetch failed
    at fetch ($PWD/node_modules/undici/index.js:110:15)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async REPL2:1:33 {
  cause: Error: Client network socket disconnected before secure TLS connection was established
      at connResetException (node:internal/errors:718:14)
      at TLSSocket.onConnectEnd (node:_tls_wrap:1600:19)
      at TLSSocket.emit (node:events:525:35)
      at TLSSocket.emit (node:domain:552:15)
      at endReadableNT (node:internal/streams/readable:1359:12)
      at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
    code: 'ECONNRESET',
    path: undefined,
    host: 'www.bing.com',
    port: 443,
    localAddress: null
  }
}
> await fetch("https://bing.com/translator");
Response {
  [Symbol(realm)]: null,
[ .. all good without explicit host: .. ]