Find the issue key for the Jira issue you want to link to, for example “JRA-123”. You can find the key in several places in Jira Software:
• On the board, issue keys appear at the bottom of a card.
• On the issue's details, issue keys appear in the breadcrumb navigation at the top of the page.
Learn more about issues and issue keys.

Checkout a new branch in your repo, using the issue key in the branch name. For example, `git checkout -b JRA-123-<branch-name>`. 

When committing changes to your branch, use the issue key in your commit message to link those commits to the development panel in your Jira issue. For example, `git commit -m "JRA-123 commit"`.

When you create a pull request, use the issue key in the pull request title.