diff -r d6afa9c149c3 -r 59fa3890d40a mercurial/sslutil.py
--- a/mercurial/sslutil.py	Sun Dec 13 18:29:22 2020 -0800
+++ b/mercurial/sslutil.py	Tue Dec 01 21:54:46 2020 +0100
@@ -16,10 +16,10 @@
 
 from .i18n import _
 from .pycompat import getattr
+from .node import hex
 from . import (
     encoding,
     error,
-    node,
     pycompat,
     util,
 )
@@ -762,9 +762,9 @@
     # If a certificate fingerprint is pinned, use it and only it to
     # validate the remote cert.
     peerfingerprints = {
-        b'sha1': node.hex(hashutil.sha1(peercert).digest()),
-        b'sha256': node.hex(hashlib.sha256(peercert).digest()),
-        b'sha512': node.hex(hashlib.sha512(peercert).digest()),
+        b'sha1': hex(hashutil.sha1(peercert).digest()),
+        b'sha256': hex(hashlib.sha256(peercert).digest()),
+        b'sha512': hex(hashlib.sha512(peercert).digest()),
     }
 
     def fmtfingerprint(s):