benchtests/scripts/compare_bench.py, benchtests/scripts/import_bench.py, benchtests/scripts/validate_benchout.py use /usr/bin/python. They are compatible with both Python 2 and Python 3, so /usr/bin/python is not inappropriate, but the Fedora preference is to make the choice explicit. This should go into both rawhide and Fedora 28.
glibc-2.27-14.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-264d881a62
glibc-2.27-14.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-264d881a62
glibc-2.27-14.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.