After my last release, I tagged my trunk with a
svn copy https://svn.abc.com/svn/project/trunk https://svn.abc.com/svn/project/tags/release_20120722 -m "Tagging the release of feature"
If I’ve merged something to the trunk that I don’t want, and I need to revert to this tag, what do I do?
You need to create revert diff like this
svn diff https://svn.abc.com/svn/project/trunk https://svn.abc.com/svn/project/tags/release_20120722 > tmp.diffand patch your trunk with thatpatch -p0 -i tmp.diff.