Whenever I try to use GIT it automatically enriches my commits with a lot of private data like user name, email and/or pc-name.

How do I configure GIT correctly so that it never automatically discloses my private data?

I already performed

```
git config --global user.name Robert
git config --global user.email ""

```

However my commits/pushes still contain my account and computer name which I consider to be private data.

What is necessary to make GIT not to publish my personal information into the repositories/internet?