terminal – iCloud Sync activity log

Trying to discover how the activity occurs while the iCloud files are being synchronized. The macOS console application displays messages from cloud, but nothing very useful:

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Activity Monitor is not displayed cloud or another process transferring a lot of information either.

I'm looking for log files in / var / log or ~ / Library / Logs, but can not find anything.

Is there a log file that could be used with tail To see the synchronization activity of iCloud in real time?