Re: Fetching everything in another bare repo

> You may want to try the "preciousObjects" repository extension, which
> was designed to prevent accidents for a case like this. Something like:
> 
>   [this will cause old versions of Git that don't understand
>    extensions.* to bail on all commands for safety]
>   $ git config core.repositoryformatversion 1
> 
>   [this will tell old versions of Git that don't understand this
>    particular extension to bail on all commands for safety. But more
>    importantly, it will tell recent versions (> 2.6.3) to allow most
>    commands, but not ones that would delete unreachable objects]
>   $ git config extensions.preciousObjects true
> 
>   [this is it in action]
>   $ git repack -ad
>   fatal: cannot delete packs in a precious-objects repo
>   $ git prune
>   fatal: cannot prune in a precious-objects repo
> 
> Sadly it's not quite smart enough to realize that "git repack -adk" is
> safe. If you want to occasionally repack with that, you'd have to
> manually disable the flag for a moment.
> 
> I will also say that while I implemented this extension a while back, it
> never actually saw production use for my intended case. So I think it's
> pretty good (and certainly safer than nothing), but it's not thoroughly
> tested in the wild.