If the Mercurial repository 'file://', has determined a different repository Jenkins Mercurial plugin by mistake.
Therefore, the repository of the Workspace repository is not updated, and will be droped and re-cloned.
[workspace] $ hg showconfig paths.default
ERROR: Workspace reports paths.default as /var/hg/bar
which looks different than file:///var/hg/bar
so falling back to fresh clone rather than incremental update