/usr/share/tripleo-image-elements/neutron/source-repository-neutron is in python-tripleo-image-elements 0.7.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | neutron git /opt/stack/neutron https://git.openstack.org/openstack/neutron.git
|