2018-06-07 14:47:21,638 [INFO] {16373} koji.build.buildroot:440 Running mock as kojibuilder
INFO: mock.py version 1.4.9 starting (python version = 3.6.4)...
Start: init plugins
INFO: selinux disabled
Finish: init plugins
Start: run
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: calling preinit hooks
INFO: enabled HW Info plugin
Mock Version: 1.4.9
INFO: Mock Version: 1.4.9
Start: dnf install
Finish: dnf install
Finish: chroot init
INFO: Installed packages:
Finish: run
2018-06-07 15:06:19,708 [INFO] {17284} koji.build.buildroot:440 Running mock as kojibuilder
INFO: mock.py version 1.4.9 starting (python version = 3.6.4)...
Start: init plugins
INFO: selinux disabled
Finish: init plugins
Start: run
INFO: Start(/tmp/koji/tasks/7914/27914/local/work/cli-build/1528297969.7546897.YxqpVbgx/R-lubridate-1.7.4-2.fc29.src.rpm)  Config(f29-build-8694-3450)
Start: chroot init
INFO: calling preinit hooks
INFO: enabled HW Info plugin
Mock Version: 1.4.9
INFO: Mock Version: 1.4.9
Finish: chroot init
Start: build phase for R-lubridate-1.7.4-2.fc29.src.rpm
Start: build setup for R-lubridate-1.7.4-2.fc29.src.rpm
ERROR: Exception(/tmp/koji/tasks/7914/27914/local/work/cli-build/1528297969.7546897.YxqpVbgx/R-lubridate-1.7.4-2.fc29.src.rpm) Config(f29-build-8694-3450) 0 minutes 30 seconds
INFO: Results and/or logs in: /var/lib/mock/f29-build-8694-3450/result
ERROR: Command failed: 
 # /usr/bin/dnf builddep --installroot /var/lib/mock/f29-build-8694-3450/root/ /var/lib/mock/f29-build-8694-3450/root//builddir/build/SRPMS/R-lubridate-1.7.4-2.fc29.src.rpm
Last metadata expiration check: 0:00:02 ago on Thu 07 Jun 2018 03:06:36 PM UTC.
Error: 
 Problem 1: conflicting requests
  - nothing provides R-glue >= 1.2.0 needed by R-stringr-1.3.1-1.fc29.noarch
 Problem 2: package R-knitr-1.20-1.fc29.noarch requires R-stringr >= 0.6, but none of the providers can be installed
  - conflicting requests
  - nothing provides R-glue >= 1.2.0 needed by R-stringr-1.3.1-1.fc29.noarch