Intro I use git as version control, it is great! But I use different email addresses in different situations and sometimes I get it wrong. Not a terrible problem but quite an annoyance. Let me show you an example: I recently contributed to the PowerShell repository (you can see my pull request here: Where-Object: add parameter ‘Not’) and I did an annoying mistake, I used the wrong email address. I have my work email configured in my global git config and sometimes I forget to change that to my private email when contributing to open source projects on GitHub.