I couldn't commit https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=65f8a6f69479f569df5eb024e1a652bdada7ce15 using repoman due to > # - body lines should be wrapped at 72 (max 80) characters error. But I cannot break URLs... so I would suggest to ignore the length of any tag (<tagname>: ) construct.
repoman support has been removed per bug 835013. Please file a new bug (or, I suppose, reopen this one) if you feel this check is still applicable to pkgcheck and doesn't already exist.
