Enforcing clone/fetch to use references.

[resending with corrected subject]

Suppose I want to publish some changes to a tree.  I have a server
available where I can run a git daemon, but for one reason or another
I want to force people to use the another git repo as a reference.
The reason could be one of bandwidth, or someone who isn't comfortable
making all of the other source available.  Ideally, someone who
already has the other git repo cloned, and just adds mine as a remote
wouldn't notice the difference.

Is there a way to do this?  I've tried various ways of using
alternates to keep the blobs out of the repository I want to export,
but the daemon just follows the alternates.  If I remove the
alternates, I then seem to have a broken repository.  Most things I
try, at least carry objects for all of the files in the HEAD tree,
which most of the time is a large portion of the data.

If there isn't a way of doing this currently, is this something that
others would find useful?

Thanks,
David

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The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.