Closed as a duplicate of #516
As well as the magit-process buffer (showing the output of the most recent git command), it would be mightily useful if that output was also appended to a magit-process-log buffer, so that we could see things like the commit hash for the stash that we dropped a couple of commands ago, and then realised that we wanted back (for example :)
Apologies for the the multiple commits referenced in this issue; that was just me failing to use appropriate branches the first two times. The code was the same for all of them.
Ah, I see a pull request creates a new issue (#515), so this one is now redundant. Closing.