$ git clone -n https://src.fedoraproject.org/rpms/py-radix.git /var/lib/mock/f40-build-734652-106000/root/chroot_tmpdir/scmroot/py-radix
Cloning into '/var/lib/mock/f40-build-734652-106000/root/chroot_tmpdir/scmroot/py-radix'...
$ git reset --hard c355ad7e2047872dbc9014065e6b2e209b8c6e45
HEAD is now at c355ad7 Apply upstream patch to fix FTBFS. https://github.com/mjschultz/py-radix/pull/44