betelgeuse@host ~ $ git svn clone --stdlayout http://agilefant.googlecode.com/svn agilefant fatal: git was built without support for git-svn (NO_PERL=YesPlease). Please update git to EAPI 4 and prevent this from happening.
I personally feel that USE="perl" should not be optional since it enables basic features of git. git add -i foo for example will throw the same error. I've hit other cases, but that one I use on a daily basis.
We cannot make the git ebuilds EAPI4 until python.eclass supports EAPI4.
*** This bug has been marked as a duplicate of bug 353657 ***