Have a look at Re: VM deployed or Removed
It is a matter of filtering on the correct events, in your case that would be the VMClonedEvent and the VMCreatedEvent.
A faster method would be to use my Get-VIEventPlus function that is in my Get the vMotion/svMotion history post.
That function is faster than the cmdlet because it uses a historycollector and the filtering is done in vSphere itself.