--- a/mercurial/commands.py	Sun Aug 20 01:12:26 2023 -0400
+++ b/mercurial/commands.py	Sun Aug 20 01:14:42 2023 -0400
@@ -2496,10 +2496,9 @@
 
     Returns 0 on success, 1 if errors are encountered.
     """
-    opts = pycompat.byteskwargs(opts)
 
     context = lambda repo: repo.dirstate.changing_files(repo)
-    rev = opts.get(b'at_rev')
+    rev = opts.get('at_rev')
     ctx = None
     if rev:
         ctx = logcmdutil.revsingle(repo, rev)
@@ -2508,9 +2507,9 @@
             def context(repo):
                 return util.nullcontextmanager()
 
-            opts[b'at_rev'] = ctx.rev()
+            opts['at_rev'] = ctx.rev()
     with repo.wlock(), context(repo):
-        return cmdutil.copy(ui, repo, pats, opts)
+        return cmdutil.copy(ui, repo, pats, pycompat.byteskwargs(opts))
 
 
 @command(