git push --quiet option does not seem to work

Hi I am using 2.8.2.windows.1 and writing Powershell scripts doing
some Git stuff.

I have to use the --quiet option for git because it constantly outputs
progress to stderr.

However, it seems that --quiet does not actually work in git push. The
output still goes to stderr.
When there are changes committed to push it always outputs something
to stderr. If there is nothing to push, then it actually is silent.