What to do if a hole is temporarily split?

How do I score it?

I'm a new user and completely lost what would be the procedure in such a case.

At our course, one hole is under repairs and another is split in two (they've got an extra green it seems for this purpose 3/4 down the fairway).

So the one hole is now two holes.

I've no idea how to tell the watch to

- close down one hole early, on a temporary green

- and score a hole that's not there

Thanks!