The "unpublished" command:

Usage: fossil unpublished ?OPTIONS?

Show a list of unpublished or "private" artifacts.  Unpublished artifacts
will never push and hence will not be shared with collaborators.

By default, this command only shows unpublished check-ins.  To show
all unpublished artifacts, use the --all command-line option.

OPTIONS:
    --all                   Show all artifacts, not just check-ins