diff -r b74e128676d4 -r 5105a9975407 hgext/largefiles/overrides.py
--- a/hgext/largefiles/overrides.py	Tue Sep 28 13:59:01 2021 -0700
+++ b/hgext/largefiles/overrides.py	Tue Sep 28 15:11:22 2021 -0700
@@ -1667,7 +1667,7 @@
 @eh.wrapcommand(b'cat')
 def overridecat(orig, ui, repo, file1, *pats, **opts):
     opts = pycompat.byteskwargs(opts)
-    ctx = scmutil.revsingle(repo, opts.get(b'rev'))
+    ctx = logcmdutil.revsingle(repo, opts.get(b'rev'))
     err = 1
     notbad = set()
     m = scmutil.match(ctx, (file1,) + pats, opts)