Support embargoed `tag-git` and `git-artifacts` workflow runs#133

dscho wants to merge 15 commits intomaingit-for-windows/git-for-windows-automation:mainfrom

embargoed-tag-git-and-git-artifactsgit-for-windows/git-for-windows-automation:embargoed-tag-git-and-git-artifactsCopy head branch name to clipboard