running "snapshot" does nothing in some cases

[jku]

"snapshot" tries to be smart and does not create a new snapshot (or timestamp) if targets changes doe not require it -- this makes sense so that we can run "snapshot" on every merge...

however this is a problem if I change snapshot keys and want a new snapshot version because of that.
I ended up bumping targets to initiate snapshot and timestamp but maybe there is a smarter way?