hgview-1.12.0-1.fc32.noarch fails to install in Fedora rawhide: nothing provides python2-sip needed by hgview-1.12.0-1.fc32.noarch This is most caused by a change in sip, see bz1753069.
IMO, just drop Requires: python2-sip it shouldn't be explicitly needed (PyQt4 should pull it in for you)
FEDORA-2019-57dcf8ad1a has been submitted as an update to Fedora 31. https://bodhi.fedoraproject.org/updates/FEDORA-2019-57dcf8ad1a
hgview-1.13.0-1.fc31 has been pushed to the Fedora 31 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-2019-57dcf8ad1a
hgview-1.13.0-1.fc31 has been pushed to the Fedora 31 stable repository. If problems still persist, please make note of it in this bug report.