In general, Koji hub calls return times as both a text field and an integer field. The text field does not have a strictly defined format and has changed over time (e.g. the issue in #2423, caused by the changes from #2160).

I generally recommend that clients that need to process times beyond just displaying the returned string use the integer fields (typically ending in _ts). However this call only returns the string.

Since the return here is single valued. I think the best way to address this without breaking the api is to add a flag to the call to request a timestamp instead.

If we make this change, we might also want to use that option in the cli and web interfaces where we use this call.