About Repositories Page
The repository page allows you to add your Git repositories and Servers to your Jira account and work with them directly from your tickets, which will make your workflow more effective.
Smart Git Integration for Jira is located in the admin area (Manage apps(1)).
Click on and select Add-ons. You will be redirected to the Atlassian Marketplace.
Click on the Repositories link(1) on the side panel.
Note, that if you deleted the last repository or just have not added any, after installing Integration App, the repositories table will be empty and you can create a new one by clicking the corresponding button.
It will open the popup window as shown in the next screenshot.
"Add Repository" button.
"Add Server" button.