Dirty Master git tutorial

gistfile1.txt

{
  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C2\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null},\"my-stuff\":{\"target\":\"C3\",\"id\":\"my-stuff\",\"remoteTrackingBranchID\":\"o/my-stuff\"},\"o/my-stuff\":{\"target\":\"C3\",\"id\":\"o/my-stuff\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"tags\":{},\"HEAD\":{\"target\":\"my-stuff\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"my-stuff\":{\"target\":\"C3\",\"id\":\"my-stuff\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
  "solutionCommand": "git branch my-stuff;git fetch origin;git reset --hard o/master;git checkout my-stuff;git push",
  "hint": {
    "en_US": "git reset --hard o/master"
  },
  "name": {
    "en_US": "Dirty Master"
  },
  "startTree": "{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\",\"remoteTrackingBranchID\":\"o/master\"},\"o/master\":{\"target\":\"C1\",\"id\":\"o/master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"},\"originTree\":{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}}",
  "startDialog": {
    "en_US": {
      "childViews": [
        {
          "type": "ModalAlert",
          "options": {
            "markdowns": [
              "## Move Your Commit",
              "Oh no! You've accidentally committed to your local `master` branch. Practice moving that commit to a feature branch, and pushing that branch to the remote repository.",
              "",
              "One glitch in this sandbox: use `o/master` where you would normally use `origin/master`.",
              ""
            ]
          }
        }
      ]
    }
  }
}

This is a git visualization demo for how to recover from accidentally commiting to master on a project that protects the master branch. Se it in action at learngitbranching.js.org.