git-rscp: update page (#11021)

pages/common/git-rscp.md

@@ -1,9 +1,13 @@
 # git rscp
 
-> This command is an alias of `git scp`, to copy files from the current working tree to the working directory of a remote repository.
+> Reverse `git scp` - copy files from the working directory of a remote repository to the current working tree.
 > Part of `git-extras`.
 > More information: <https://github.com/tj/git-extras/blob/master/Commands.md#git-scp>.
 
-- View documentation for the original command:
+- Copy specific files from a remote:
 
-`tldr git scp`
+`git rscp {{remote_name}} {{path/to/file1 path/to/file2 ...}}`
+
+- Copy a specific directory from a remote:
+
+`git rscp {{remote_name}} {{path/to/directory}}`