INFO: mock.py version 1.2.7 starting (python version = 2.7.8)...
Start: init plugins
INFO: tmpfs initialized
INFO: selinux disabled
Finish: init plugins
Start: run
INFO: Start(/var/tmp/varnish/varnish-4.0.3-4.fc21.art.src.rpm)  Config(fedora-15-x86_64)
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: mounting tmpfs at /var/lib/mock/fedora-15-x86_64/root.
INFO: calling preinit hooks
INFO: enabled root cache
Start: unpacking root cache
ERROR: Exception(/var/tmp/varnish/varnish-4.0.3-4.fc21.art.src.rpm) Config(fedora-15-x86_64) 0 minutes 0 seconds
INFO: Results and/or logs in: /var/lib/mock/fedora-15-x86_64/result
INFO: unmounting tmpfs.
ERROR: Exiting on user interrupt, <CTRL>-C