Re: [PATCH 5/6] Teach "fsck" not to follow subproject links

Linus Torvalds [off-list ref] writes:

But for git projects, even alternates isn't safe, in case somebody bases 
their own work on a version of "pu" that eventually goes away (even with 
reflogs, pruning *eventually* takes place).

So I tend to think that alternates and shared object directories are 
really for "temporary" stuff, or for *managed* repositories that are at 
git *hosting* sites (eg repo.or.cz), and where there is some other safety 
involved, ie users don't actually access the object directories directly 
in any way.

Actually that is not even true for repo.or.cz -- the site lets
people to create *forks* of the main project, and I recall it is
implemented in terms of alternates.

That's one of the reasons I never asked to take over git.git
repository there.  I have alt-git.git instead, which does not
allow forks.