And waits for them. That's pointless.
{
            if (interserver_scheme != address.scheme)
                throw Exception("Interserver schemes are different: '" + interserver_scheme
                    + "' != '" + address.scheme + "', can't fetch part from " + address.host,
                    ErrorCodes::INTERSERVER_SCHEME_DOESNT_MATCH);
            return fetcher.fetchPart(
                metadata_snapshot,
                getContext(),
                part_name,
                source_replica_path,
                address.host,
                address.replication_port,
                timeouts,
                credentials->getUser(),
                credentials->getPassword(),
                interserver_scheme,
                replicated_fetches_throttler,
                to_detached,
                "",
                &tagger_ptr,
                true);
        };
    }
    try
    {
        part = get_part();
        if (!to_detached)
        {
            Transaction transaction(*this);
            renameTempPartAndReplace(part, nullptr, &transaction);