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+Let's suppose that I've manually modified files in .git/annex/objects, for example I ran an rsync or some other file synchronization software to copy files. As a result, some objects have disappeared, others have appeared. After that `git annex whereis .' displays stale information, it doesn't take the manual modifications to accound. `git annex fsck' seems to fix this, but it runs the rehashing of all new files, so it's slow. Is there a fast alternative, which notices all the file changes, trusts them, and just updates .git/annex/index?