Is there a way to get the currently selected shots from the sequencer?
Not in any currently released version. However, it will be available in 4.26. If you build from source, you can find the specific changelist that added that functionality here:
That’s great news. Thanks for the link.
From which Branch can I Pull this already? “Dev-Editor” only?
Yes, this was submitted to Dev-Editor at CL 13044633