diff -r 0b8e076e878c -r 8c4881c07f57 mercurial/scmutil.py
--- a/mercurial/scmutil.py	Fri Nov 19 15:40:56 2021 -0800
+++ b/mercurial/scmutil.py	Fri Nov 19 16:16:21 2021 -0800
@@ -180,6 +180,8 @@
             )
         )
     except error.RepoError as inst:
+        if isinstance(inst, error.RepoLookupError):
+            detailed_exit_code = 10
         ui.error(_(b"abort: %s\n") % inst)
         if inst.hint:
             ui.error(_(b"(%s)\n") % inst.hint)