how to cancel (stop) the build task which has strange state

[peng chen]

hello, fedora-buildsys-list:
I encounter with several strange build tasks, which build state is
building,but task state is failed.
resultly, these build tasks are always in the building state. I run command
"koji cancel " ,but failed to
cancel it ,it's  still there(my koji website). So, how could I cancel (stop
) these strange build tasks.
In addition, during these package building, the koji server and  building
host had poweroffed.
Thanks!
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