Update cheatsheets

tldr/linux/koji-help

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# koji help
+
+> Display help information for Koji commands.
+> More information: <https://docs.pagure.org/koji/HOWTO/#exploring-koji>.
+
+- Display all available commands:
+
+`koji help`
+
+- Display help for specific subcommand (such as `build`, `call`, `cancel`, `tag-build`, etc.):
+
+`koji help {{subcommand}}`
+
+- Display help:
+
+`koji {{[-h|--help]}}`