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Breaking down the fields in the interface makes it easier to change the backend of for_each_alternate_ref to something that doesn't use "struct ref" internally. The only field that callers actually look at is the oid, anyway. The refname is kept in the interface as a plausible thing for future code to want. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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