Unwatch All Org Repos

unwatch-gh-org.js

// Navigate to https://github.com/watching and then run:
// Taken from: https://stackoverflow.com/questions/11043374/how-to-unwatch-multiple-repos-easily-on-github

Array.prototype
  .slice.apply(document.querySelectorAll('.js-subscription-row'))
  .forEach(el => { const org = el.querySelector('a[href^="/YOUR_ORG"]'); if (org) el.querySelector('button').click()});

Had to modify script from @edman / @gaqzi to get it work for me in FF/Chrome. Minor changes, thanks to @dwells:

(function() {
  let qx = $x;
  let unwatch = function(org, notificationType) {
    let nodes = document.querySelectorAll(".Box-row");
    let rows = [...nodes];
    let orgRows = rows.filter(e => e.innerText.startsWith(`${org}/`));
    let orgUnsubButtons = orgRows.map(row =>
      row.querySelector(`button.SelectMenu-item[value="${notificationType}"]`)
    );
    orgUnsubButtons.forEach(button => console.log(button.click()));
    //orgUnsubButtons.forEach(button => console.log(`click ${notificationType}`));
    setTimeout(function() {}, 1000);
  };
  let org = "ORG"; // <--- change ORG to desired organization, and repeat for all pages
  let notificationType = "included"; // 'included' = participating and @mentions, 'subscribed' = all activity, 'ignore' = ignore
  unwatch(org, notificationType);
})();

This feature now seems to be integrated into https://github.com/watching. Just click "Unwatch all" and selected the organization.