Github to Jira is a powerful extension that provides a quick and easy way to get from a given pull request to the corresponding Jira ticket. This can be extremely useful in cases where the pull request does not include a link to the relevant ticket or it is not clearly marked as such. 

You can even set a specific ticket prefix that will be automatically linked to each pull request from your repository. It is worth mentioning that if the extension is enabled and you are an Atlassian Jira user, you will be able to automatically access pull request and ticket links for all of the issues from your projects.