add revert commit

pages/git/revert-commit.md

@@ -0,0 +1,16 @@
+# Revert branch to commit
+
+Revert a branch to a certain commit, discarding newer ones.
+
+```bash
+# Specific commit
+git reset --hard a1d6424
+
+# Commits back
+git reset --hard HEAD@{3}
+```
+
+```bash
+# Push
+git push -f
+```