If I trigger a build with these SSH command line options

build SND-Admin-WSA -s -w -r 5

The build is triggered, but there is no output of which build number has started until AFTER the job has fully completed.

So, in essence we get the following two output lines at exactly the same time:

Started SND-Admin-WSA #58.
Completed SND-Admin-WSA configure-Resources_58 : SUCCESS.

It seems like we should get the Started message as soon as an executor picks up the job and it is running. That way the SSH client will know that the job is in progress and which build number it was assigned.