Not all of the right click pop-up menu items from inside the Browse Repository window respect the usage of the ellipsis (3 dots at the end). The presence of the ellipsis would indicate that further options need to be set before proceeding with actually executing the command. The absence of the ellipsis would indicate that the command will be executed immediately (a yes/no confirmation might still appear if in case of a Delete action for instance).

From Microsoft UX Guide

Proper use of ellipses is important to indicate that users can make further choices before performing the action, or even cancel the action entirely. The visual cue offered by an ellipsis allows users to explore your software without fear.

Ellipses should be used for instance in case of the menu items like: Merge Branch, Track Remote Branch, Rename, Delete (in this case Delete should use ellipsis because the Force option can be set in the new dialog, it's not just a confirmation).