The ppc64le builders appear to be stuck. There are currently 94 pending tasks, of which 57 are ppc64le, the oldest of which is now 6 hours. There are no currently running tasks for ppc64le.
Shortly after I filed this, the ppc64le tasks began to process. All pending tasks are now cleared (the last one is running now).
ppc64le boxes have some troubles ATM: https://pagure.io/fedora-infrastructure/issue/7868 > Shortly after I filed this, the ppc64le tasks began to process. Since the issues is a bit fuzzy, it could happen that the issue fixed itself :-) but likely someone stepped in and removed the broken leftover VMs (same as I did now). Sorry for (hopefully temporary) inconvenience.