git-clone --config order & fetching extra refs during initial clone

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

The documentation for git-clone --config says:
| Set a configuration variable in the newly-created repository; this takes
| effect immediately __AFTER__ the repository is initialized, but __BEFORE__
| the remote history is fetched or any files checked out. [...]
(emphasis added)

However, this doesn't seem be be true, right after the clone, the refs are NOT present, and the next fetch seems to pull the extra refs. This seems to be because the refspec building for the initial clone doesn't take into account any fetch lines added to the config.

Testcase to reproduce (confirmed in v2.11.1, not tested 2.12.0 quite yet):
# export REPOURI=https://github.com/openstack-dev/sandbox.git DIR=test
# git clone \
    -c remote.origin.fetch=+refs/notes/*:refs/notes/* \
    -c remote.origin.fetch=+refs/changes/*:refs/remotes/origin/changes/* \
    $REPOURI $DIR \
  && cd $DIR \
  && git fetch