app: Fix various CLI metavariable names

- Use `REV` instead of `REF` in places where we meant it.
- Fix `commit --parent` actually taking a commit checksum and not a ref.
- Fix `ostree admin switch` using `REF` instead of `REFSPEC`.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/ostree/ot-builtin-log.c b/src/ostree/ot-builtin-log.c
index 306f177b..0a1d408b 100644
--- a/src/ostree/ot-builtin-log.c
+++ b/src/ostree/ot-builtin-log.c
@@ -95,7 +95,7 @@ ostree_builtin_log (int           argc,
   g_autofree char *checksum = NULL;
   OstreeDumpFlags flags = OSTREE_DUMP_NONE;
 
-  context = g_option_context_new ("REF");
+  context = g_option_context_new ("REV");
 
   if (!ostree_option_context_parse (context, options, &argc, &argv, invocation, &repo, cancellable, error))
     goto out;
@@ -105,7 +105,7 @@ ostree_builtin_log (int           argc,
 
   if (argc <= 1)
     {
-      ot_util_usage_error (context, "A ref argument is required", error);
+      ot_util_usage_error (context, "A rev argument is required", error);
       goto out;
     }
   rev = argv[1];