Update cheatsheets

git-update-ref

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# git update-ref
+
+> Git command for creating, updating, and deleting Git refs.
+> More information: <https://git-scm.com/docs/git-update-ref>.
+
+- Delete a ref, useful for soft resetting the first commit:
+
+`git update-ref -d {{HEAD}}`
+
+- Update ref with a message:
+
+`git update-ref -m {{message}} {{HEAD}} {{4e95e05}}`