Use the "--log-format" option to format the file transfer log as you wish. See "man rsyncd.conf" to see all the possible log format keys.
For example:
rsync --log-format='%f' somefile.txt somehost: >rsync.log
will output to rsync.log:
somefile.txt
NOTE: rsync will list the filename also if the file already exists in the destination. In this case, rsync only transfers a bit of metadata (file modification time, checksum) to allow the receiving end to verify that the file is the same and no transfer is needed.
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