Add undo snippets

snippets/undo-commit.md

@@ -0,0 +1,17 @@
+---
+title: Undo a commit
+tags: commit,branch,intermediate
+---
+
+Undoes a specified commit without rewriting history.
+
+- Use `git revert <commit>` to revert the specified `<commit>`, creating a new commit with the inverse of the commit's changes.
+
+```sh
+git revert <commit>
+```
+
+```sh
+git revert 3050fc0d3
+# Reverts the commit `3050fc0d3`
+```

snippets/undo-last-commit.md

@@ -0,0 +1,17 @@
+---
+title: Undo the last commit
+tags: commit,branch,intermediate
+---
+
+Undoes the last commit without rewriting history.
+
+- Use `git revert HEAD` to revert the last commit, creating a new commit with the inverse of the commit's changes.
+
+```sh
+git revert HEAD
+```
+
+```sh
+git revert HEAD
+# Reverts the last commit
+```