Comes from: Investigate changes in SERVER-68597:
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We added a new `skipTempCollections`parameter to the dbHash command that will skip computing the hash for temporary collections. It is an internal parameter meant for our testing framework : we don't see an external usage nor do we really want to publicize it.

Description of Linked Ticket

A number of jstests test commands which might create temporary collections as a side-effect of normal operation. Usually, it's okay to check these temp collections during dbhash checks but shard split has an implicit stepup (to elect a recipient primary) which will clear temp collections. In this case, we see dbhash check failures because the donor has the temp collection, and the recipient does not.