This is a GreeseMonkey script for enabling commit messages

commit-message.user.js

// ==UserScript==
// @name     Copy Commit Message
// @version  1
// @include  https://jira*
// @require  https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.0/jquery.min.js
// @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
// @grant    GM_setClipboard
// @grant    GM_addStyle
// ==/UserScript==

if ($('#ghx-header').length) {
 	waitForKeyElements ('.ghx-selected', issueLinkFound); // FOR SPRINT BOARD
} else {
  waitForKeyElements ('#summary-val', issueLinkFound); // FOR FULL PAGE VIEW
}



function issueLinkFound(jNode) {
  console.log('Greese Monkey is active!!!')
  var summary = $('#summary-val');
  console.log('Commit Message: summary = ', summary.text());

	var issueKey  = $('#issuekey-val').length?$('#issuekey-val').text(): $('#key-val').attr('data-issue-key');
  console.log('Commit Message: issueKey = ', issueKey);
  var content = `${issueKey}: ${summary.text()}`;
  console.log(`Commit Message: ${content} ready to be copied`);
	var htmlContent = `
   <div class="wrap" id="do-not-insert">
       <strong class="name" title="Commit Message">
          <label for="commit-message">Commit Message:</label>
       </strong>
       <span id="commit-message" class="twixi-block expanded flooded" title="${content}"><div style="background: #f0f0f0; overflow:auto;width:auto;border:solid gray;border-width:.1em .1em .1em .8em;padding:.2em .6em;"><pre style="margin: 0; line-height: 125%; width:100%">${content}</pre></div></span>
   </div>
`;
//   var htmlContent = `
//  <style type="text/css">
        
//   .terminal {
//     position: relative;
//     width: 80%;
//     max-width: 600px;
//     border-radius: 6px;
//     padding-top: 45px;
//     margin-top: 8px;
//     overflow: hidden;
//     background-color: rgb(15, 15, 16);
//   }

//   .terminal::before {
//     content: "\2022 \2022 \2022";
//     position: absolute;
//     top: 0;
//     left: 0;
//     height: 4px;
//     background: rgb(58, 58, 58);
//     color: #c2c3c4;
//     width: 100%;
//     font-size: 2rem;
//     line-height: 0;
//     padding: 14px 0;
//     text-indent: 4px;
//   }

//   .terminal pre {
//     font-family: SFMono-Regular, Consolas, Liberation Mono, Menlo, monospace;
//     color: white;
//     padding: 0 1rem 1rem;
//     margin: 0;
//   }

//     </style>
// <div class="wrap" id="do-not-insert">
// <strong class="name" title="Commit Message">
// <span class="twixi-block expanded flooded terminal"> 
// <pre>${content}</pre>
// </strong>
//   </span>
//   </div>
// `;
  console.log('htmlContent = ', htmlContent);
  if ($('#do-not-insert').length) {
    // Element already exist
  } else {
    if ($('#details-module-label').length) {
      $('#details-module-label').after(htmlContent);
    }
  }
// 	if ($('#details-module_heading').length) $('#details-module_heading').after(htmlContent);
  
}