Selectively unwatch github repositories.

unwatch_github_repos.js

// In case you are a member of a big organization, you may want to unwatch a lot of repositories, by some filter.
// This code snippet allows to unwatch many repositories at once by specified filter.
// Modify this snippet by your needs and paste it to the JavaScript console in your browser.

// https://github.com/watching

$( "button" ).each( function() {
    var text = $.trim( $(this).text() );
    var repo = $.trim( $(this).closest("li.js-subscription-row").find("a").text() );
    if ( text == "Unwatch" && repo.match(/^zopefoundation/) ) {
        $(this).click();
    }
} );