Re: [Bug] git fetch --dry-run --filter makes changes to .git/config

Jeff King [off-list ref] writes:

... It is unfortunate that doing so updates the repo
config, though. That may show a mismatch in how the promisor information
is stored (it is really a property of the packfile in the object
directory, but the config mechanism stores it in the main repo). But it
is probably not worth trying to revisit at this point. It is only when
you start to play weird games like "this repo's object directory is not
$GIT_DIR/objects" that you run into these distinctions.

Hmph, but watching from the sidelines Patrick's topics that revolve
around (re)defining the boundary and relationship among repository,
object store, and on-disk packfiles with a more clearly defined
abstractions like object_source, I am hoping that we somehow can
find a good place to move this information out of the per-repo
configuration to somewhere close to individual packs.  I dunno.