Not really any good or supported way, no.
If you’re up for some hackishness that may or may not work, you could in principle copy the entire database from one device to another. Any deviations in the actual local data will then be picked up as new changes, which you can then revert because you’re in receive-only mode.
I haven’t tried this myself for a long time. There may be dragons.
Oh, and if the data is only “almost” the same (say, the modification timestamps are different because the filesystem on one side supports nanosecond precision and the other side just microsecond precision, or the permissions are different) then that data will anyway be rescanned since it doesn’t match what’s in the database. You could possibly set the mod time window and ignore permissions options to counter this.