git-ls-tree, git-rev-list, git-rev-parse: add pages (#3644)

pages/common/git-rev-parse.md

@@ -0,0 +1,16 @@
+# git rev-parse
+
+> Display metadata related to specific 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`