Custom source timeout?

[RoyalOughtness]

For @secureblue/hardened-chromium, the source extraction and cleaning for the underlying chromium takes between 58 minutes and 62 minutes on the COPR source builder.

Since the source build timeout is 60 minutes, this means that 1 out of every 3 or 4 source builds gets timed out. Is there any way we can increase this to say 90 minutes? I see there's a field for build timeout customization, but not for source timeout.

Making this change would result in less copr builder usage by @secureblue/hardened-chromium since we wouldn't need to retry those timed-out builds.

[RoyalOughtness]

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