You must unlearn what you have learned...

gistfile1.txt

{
  "goalTreeString": "{\"branches\":{\"master\":{\"target\":\"C1\",\"id\":\"master\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C4\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"},\"C8\":{\"parents\":[\"C7\"],\"id\":\"C8\"},\"C9\":{\"parents\":[\"C8\"],\"id\":\"C9\"}},\"tags\":{},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
  "solutionCommand": "git branch -d storyA;git branch -d feedback;git checkout master;git branch -d storyB;git reset C1",
  "startTree": "{\"branches\":{\"master\":{\"target\":\"C3\",\"id\":\"master\",\"remoteTrackingBranchID\":null},\"storyA\":{\"target\":\"C4\",\"id\":\"storyA\",\"remoteTrackingBranchID\":null},\"feedback\":{\"target\":\"C5\",\"id\":\"feedback\",\"remoteTrackingBranchID\":null},\"storyB\":{\"target\":\"C9\",\"id\":\"storyB\",\"remoteTrackingBranchID\":null}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C2\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C2\"],\"id\":\"C4\"},\"C5\":{\"parents\":[\"C4\"],\"id\":\"C5\"},\"C6\":{\"parents\":[\"C4\"],\"id\":\"C6\"},\"C7\":{\"parents\":[\"C6\"],\"id\":\"C7\"},\"C8\":{\"parents\":[\"C7\"],\"id\":\"C8\"},\"C9\":{\"parents\":[\"C8\"],\"id\":\"C9\"}},\"tags\":{},\"HEAD\":{\"target\":\"storyB\",\"id\":\"HEAD\"}}",
  "name": {
    "en_US": "You must unlearn what you have learned..."
  },
  "hint": {
    "en_US": ""
  },
  "startDialog": {
    "en_US": {
      "childViews": [
        {
          "type": "ModalAlert",
          "options": {
            "markdowns": [
              "It is easy and useful to think of a branch as a container for commits.",
              "",
              "Easy, useful...and wrong!"
            ]
          }
        }
      ]
    }
  }
}