The tree generated by git-annex sync with a borg remote 
does not seem to get grafted into the git-annex branch, so
would be subject to being lost to GC. 

Is this a general problem affecting importtree too?

> Yes, it was. It would have only caused a problem if the user
> kept doing imports from a remote, but never exporting to it.
> Then, in a clone of the repo that was importing, they would not be able
> to get files. [[fixed|done]] --[[Joey]]