Right-click the project in the Navigator panel and select Git > Show Remote Changes from the context menu.
— or —
Select Project > Git > Show Remote Changes from the main menu.
Note: If the command is disabled, make sure you enabled integration with Git.
The Remote Repository Changes dialog will appear. In this dialog, you can view changes stored to the repository:
To view the difference between file versions, click the View option in the Details column. This will open a window where you can see the difference: