You can rate it and specify the hour at a time
svn log | sed -n '/ XX:/,/-----$/ p'
Replace XX with the hour you want to use. 22.
Edit: To display all the hours you want, you can make a script that runs this command for every hour and puts it in a log file.
#!/bin/sh svn log | sed -n '/ 19:/,/-----$/ p' >> svn.log svn log | sed -n '/ 20:/,/-----$/ p' >> svn.log svn log | sed -n '/ 21:/,/-----$/ p' >> svn.log svn log | sed -n '/ 22:/,/-----$/ p' >> svn.log ...
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