[Re-sending, as I used an old address for Gábor on the original]

On Sat, Feb 25, 2017 at 07:12:38PM +0000, Robin H. Johnson wrote:

TL;DR: git-clone ignores any fetch specs passed via --config.

I agree that this is a bug. There's some previous discussion and an RFC
patch from lat March (author cc'd):

  http://public-inbox.org/git/1457313062-10073-1-git-send-email-szeder@ira.uka.de/

That discussion veered off into alternatives, but I think the v2 posted
in that thread is taking a sane approach.

-Peff