I don't know what happened there. Attached and copied below is the correct patch off core-updates, and I have made separate local copies of the repo for testing master, staging, and core-updates.
From 76b856f408728863bea40ff274f65c1820e0579f Mon Sep 17 00:00:00 2001
Date: Wed, 23 Dec 2020 20:50:55 +0000
Subject: [PATCH] gnu: openblas: Update to 0.3.13.
* gnu/packages/maths.scm (openblas): Update to 0.3.13.
---
gnu/packages/maths.scm | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/gnu/packages/maths.scm b/gnu/packages/maths.scm
index b1680db063..3120bfcbac 100644
--- a/gnu/packages/maths.scm
+++ b/gnu/packages/maths.scm
@@ -3628,7 +3628,7 @@ parts of it.")
(define-public openblas
(package
(name "openblas")
- (version "0.3.10")
+ (version "0.3.13")
(source
(origin
(method git-fetch)
@@ -3638,7 +3638,7 @@ parts of it.")
(file-name (git-file-name name version))
(sha256
(base32
- "174id98ga82bhz2v7sy9yj6pqy0h0088p3mkdikip69p9rh3d17b"))))
+ "14jxh0v3jfbw4mfjx4mcz4dd51lyq7pqvh9k8dg94539ypzjr2lj"))))
(build-system gnu-build-system)
(arguments
`(#:test-target "test"
--
2.29.2