INFO: mock.py version 1.4.3 starting (python version = 3.6.2)...
Start: init plugins
INFO: tmpfs initialized
INFO: selinux disabled
Finish: init plugins
Start: run
INFO: Start(/var/tmp/libb64/libb64-1.2.1-2.1.fc26.art.src.rpm)  Config(fedora-25-x86_64)
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: mounting tmpfs at /var/lib/mock/fedora-25-x86_64/root.
INFO: calling preinit hooks
INFO: enabled root cache
INFO: root cache aged out! cache will be rebuilt
INFO: enabled dnf cache
Start: cleaning dnf metadata
Finish: cleaning dnf metadata
INFO: enabled HW Info plugin
Mock Version: 1.4.3
INFO: Mock Version: 1.4.3
Start: dnf install
Finish: dnf install
Start: creating root cache
Finish: creating root cache
Finish: chroot init
INFO: Installed packages:
Start: build phase for libb64-1.2.1-2.1.fc26.art.src.rpm
Start: build setup for libb64-1.2.1-2.1.fc26.art.src.rpm
Finish: build setup for libb64-1.2.1-2.1.fc26.art.src.rpm
Start: rpmbuild libb64-1.2.1-2.1.fc26.art.src.rpm
Start: Outputting list of installed packages
Finish: Outputting list of installed packages
Finish: rpmbuild libb64-1.2.1-2.1.fc26.art.src.rpm
Finish: build phase for libb64-1.2.1-2.1.fc26.art.src.rpm
INFO: Done(/var/tmp/libb64/libb64-1.2.1-2.1.fc26.art.src.rpm) Config(fc25-x86_64) 1 minutes 43 seconds
INFO: Results and/or logs in: /var/lib/mock/fedora-25-x86_64/result
Finish: run
INFO: unmounting tmpfs.