Comment by microtherion

The code in question seems to be this portion of SendMessageWithData in ssh/protocol.go [1]:

  buf := make([]byte, 32768)
  for {
    n, err := data.Read(buf)
    if n > 0 {
      err := conn.pl.WritePacket(buf[0:n])
      if err != nil {
        return err
      }
    }
    if err != nil {
      break
    }
  }

The write packet size seems to be determined by how much data the reader returns at a time. That could backfire if the reader were e.g. something like line at a time (no idea if something like that exists in Golang), but that does not seem to be the case here.

[1] https://github.com/git-lfs/git-lfs/blob/d3716c9024083a45771c...