See https://koji.fedoraproject.org/koji/taskinfo?taskID=36637127 python-httpretty python-httpretty-0.9.5-6.fc31 fails to build in Fedora 31 with: No matching package to install: 'python2-tornado' The python2-tornado was removed based on https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/ZXXOWINEGTILQRKCYZS43L6E4Y6EV5LI/ Please drop the build dependency on python2-tornado and make the package build. This blocks the Python 3.8 rebuild.
Fixed with https://src.fedoraproject.org/rpms/python-httpretty/c/ff0a0952256cad81d37dc55ccfb69e114941dfe3 https://koji.fedoraproject.org/koji/buildinfo?buildID=1348021
Note that python-boto-0:2.45.0-12.fc31.src BuildRequires python2-httpretty and the maintainer(s) will likely be surprised by your fix of the problem.