Bitbucket Helpers :)

bitbucket.js

function getCommits(includeMerge = false) {
  return Array.from(document.querySelectorAll(`.commits-table tbody tr${ includeMerge ? '' : ':not(.merge)' }`)).map(e => ({
    ...(JSON.parse(e.dataset.commitJson)),
    isMerge: e.classList.contains('merge')
  }))
}

function getBranches() {
  return Array.from(document.querySelectorAll('#branch-list tbody tr:not(.base-branch)')).map(e => ({
    name: e.querySelector('.branch-name-column').innerText,
    behind: parseInt(e.querySelector('.ahead-behind-column .count-graph.behind-graph').innerText) || 0,
    ahead: parseInt(e.querySelector('.ahead-behind-column .count-graph.ahead-graph').innerText) || 0,
    updated: e.querySelector('.last-updated-column time').getAttribute('datetime')
  }))
}

function getStaleBranches() {
  return getBranches().filter(b => b.ahead === 0)
}

// remove all released branches (ahead = 0)
console.log(`git push origin :${ getStaleBranches().map(b => b.name).join(' :') }`);