Cloning should contribute to _just_pulled.

When doing a "muddle pull" causes new things to be checked out
(cloned), as it can do in the new mechanism, then such should
count in _just_pulled.

Indeed, there's some sense in regarding "muddle checkout" as
setting _just_pulled.

Of course, in that case any new build descriptions "pulled"
because of subdomain changes should also count, which they
don't yet.