Sometimes we just see, eg:
22:58 logmsgbot: ebernhardson synchronized php-1.23wmf15/extensions/Flow/
Where others give more information:
00:17 logmsgbot: ori synchronized php-1.23wmf16/extensions/CentralNotice 'Update CentralNotice to tip of wmf_deploy for I7d8259fc4'
The easy bit of extra info that could be included automatically is the hash associated with the latest commit for what is being sync'd.