Always disable network tests

mock (by default) and koji builds never have network access, but testing
that capability through a DNS resolution is not always accurate.
Forcefully disable all network tests to avoid unnecessary build failures.

python-pygit2-network-tests.patch

@@ -0,0 +1,12 @@
+diff -up ./test/utils.py.orig ./test/utils.py
+--- ./test/utils.py.orig	2024-02-12 12:22:29.272147056 -0500
++++ ./test/utils.py	2024-02-12 12:23:45.876659120 -0500
+@@ -50,7 +50,7 @@ except socket.gaierror:
+     has_network = False
+ 
+ requires_network = pytest.mark.skipif(
+-    not has_network,
++    True,
+     reason='Requires network')
+ 
+ with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:

python-pygit2.spec

@@ -13,6 +13,10 @@ Patch0: python-pygit2-transfer-size.patch
 # higher contain the patches needed for Python >= 3.12.
 # Remove when cffi >= 1.16.0 is available on all releases with Python 3.12.
 Patch:          python-pygit2-cffiver.patch
+# mock (by default) and koji builds never have network access, but testing
+# that capability through a DNS resolution is not always accurate.
+# Forcefully disable all network tests to avoid unnecessary build failures.
+Patch:          python-pygit2-network-tests.patch
 
 BuildRequires:  make
 BuildRequires:  gcc