hack.js

var source_url = "http://maismedicos.saude.gov.br/new/web/app.php/selecao-municipio/selecionar"
const returnedBack = async (url) => { return await fetch(url).then(response => (document.URL == response.url)) }

i = 0;
keep_on_trying = true;
while (keep_on_trying) {
    if (await returnedBack(source_url)) {
        i += 1;
        console.log(`[${i}]Still not available, retry`);
    } else {
        console.log("!!!SUCCESS!!!");
        console.log("Tente abrir a selecionar página");
        var aTags = document.getElementsByTagName("a");
        var found;
        for (var i = 0; i < aTags.length; i++) {
          if (aTags[i].textContent == "Selecionar") {
            found = aTags[i];
            break;
          }
        }
        found.click();
    };
};