The pytest version is pinned:

Executing(%check): /bin/sh -e /var/tmp/rpm-tmp.heIEyb
+ umask 022
+ cd /builddir/build/BUILD
+ cd pytest-fixture-config-1.4.0
+ /usr/bin/python2 setup.py test
running test
Searching for pytest<4.0.0
Reading https://pypi.org/simple/pytest/
Download error on https://pypi.org/simple/pytest/: [Errno -2] Name or service not known -- Some packages may not be found!
Couldn't retrieve index page for 'pytest'
Scanning index of all packages (this may take a while)
Reading https://pypi.org/simple/
Download error on https://pypi.org/simple/: [Errno -2] Name or service not known -- Some packages may not be found!
No local packages or working download links found for pytest<4.0.0
error: Could not find suitable distribution for Requirement.parse('pytest<4.0.0')
error: Bad exit status from /var/tmp/rpm-tmp.heIEyb (%check)
    Bad exit status from /var/tmp/rpm-tmp.heIEyb (%check)

This blocks the bootstrap of Python 3.8.