changelog.js

var start = 'HEAD';
var end = 'fc402a5d37302265f87c77b2abe6cb06cde276b0';
require('child_process').exec(
  'git log --grep="\\[.*]" --no-merges ' + end + '~1..' + start,
  function (error, stdout, stderr) {
    console.log('stdout: ' + stdout);
    console.log('stderr: ' + stderr);
    console.log('exec error: ' + error);
  })