golang-1.7-1.fc26 http://arm.koji.fedoraproject.org/koji/taskinfo?taskID=3692949 Too numerous failures to actually paste in here so check the logs
Seems as the same issue as on the primary intel HW builders. TBH i haven't tried to do the scratch builds on the AArch prior the build. I guess this is not caused by any change in the Golang, but by change in the distro/builder environment as the previous builds succeeded. Looking at the arm koji it seems golang-1.6.3-2 is now failing in the similar fashion. Hopefully I will be finally able to reproduce this outside the koji builder environment.
Turned out to be caused by limit on number of processes for kojid imposed by systemd on the koji builders. Issue should be resolved by now.