Update cheatsheets

git-rev-parse

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# git rev-parse
+
+> Display metadata related to revisions.
+> More information: <https://git-scm.com/docs/git-rev-parse>.
+
+- Get the commit hash of a branch:
+
+`git rev-parse {{branch_name}}`
+
+- Get the current branch name:
+
+`git rev-parse --abbrev-ref {{HEAD}}`
+
+- Get the absolute path to the root directory:
+
+`git rev-parse --show-toplevel`