Re: [PATCH v2] send-pack: never fetch when checking exclusions

> When building the packfile to be sent, send_pack() is given a list of
> remote refs to be used as exclusions. For each ref, it first checks if
> the ref exists locally, and if it does, passes it with a "^" prefix to
> pack-objects. However, in a partial clone, the check may trigger a lazy
> fetch.
> 
> The additional commit ancestry information obtained during such fetches
> may show that certain objects that would have been sent are already
> known to the server, resulting in a smaller pack being sent. But this is
> at the cost of fetching from many possibly unrelated refs, and the lazy
> fetches do not help at all in the typical case where the client is
> up-to-date with the upstream of the branch being pushed.
> 
> Ensure that these lazy fetches do not occur.