19:33:10  # /usr/bin/yum --installroot /var/lib/mock/fedora-24-x86_64-0647740b503ca31b52523ef488912256-11410/root/ --releasever 24 install @buildsys-build gcc git java-1.8.0-openjdk-devel libxml2 libxml2-devel maven python python-devel python-enum34 python-flake8 python-lxml python-nose python-pycurl python-six python-wheel python3 python3-devel python3-enum34 python3-lxml python3-nose python3-pycurl python3-six python3-wheel --setopt=tsflags=nocontexts
19:33:10 Failed to set locale, defaulting to C
19:33:10 Package python-lxml is obsoleted by python2-lxml, trying to install python2-lxml-3.7.2-1.fc24.x86_64 instead
19:33:10 Package python-nose is obsoleted by python2-nose, trying to install python2-nose-1.3.7-11.fc24.noarch instead
19:33:10 Package python-wheel is obsoleted by python2-wheel, trying to install python2-wheel-0.30.0a0-2.fc24.noarch instead

From the .packages file:

gcc
git
java-1.8.0-openjdk-devel
libxml2
libxml2-devel
maven
python
python-devel
python-enum34
python-flake8
python-lxml
python-nose
python-pycurl
python-six
python-wheel
python3
python3-devel
python3-enum34
python3-lxml
python3-nose
python3-pycurl
python3-six
python3-wheel

Maybe start by updating that list?