How to get / set Unity Editor main window title?

I'm creating a tool that shows your current branch in Unity window title.

But I cannot get or set the title. So far I managed to set title property, I used Internal_SetTitle (using Reflection), but the values does not show up in the actual window title.

On the contrary, I can set position property of main window just fine using the same method.

Did anybody manage to alter the title using UnityEditor classes?

(probably I could work the issue around by creating native plugins for that, but I'd prefer a cross-platform / Mono solution if there is any)