I believe this was resolved erroneously. The bug report was about the git plugin hiding error output, and the output Mark mentioned is only a log of all the commands issued – but if any of them fails, their stderr is still not logged. This sometimes makes debugging difficult, especially in the case of transient errors.
It's not helpful at all, for example, if we have a single error 24h ago that fixed itself later, where all we get in the log is Error cloning remote repo 'origin' with no way to know if it was a timeout, authentication error or a broken workspace. Getting git's stderr into the log would be much better.
I was about to report this as a new bug but found this instead. I can file it again if you prefer – but I think this one should be reopened.