It woul'd be a good thing to do a "glsa-sync" so it syncs only the glsa, not the complete Portage-Tree. Reproducible: Always Steps to Reproduce: 1. 2. 3.
Pointless. If you really want to do this, it's as simple as: rsync rsync://rsync.gentoo.org/gentoo-portage/metadata/glsa/ /usr/portage/metadata/glsa/ (add or remove some options as you wish) I'm not going to support this as it will create stupid bugs if the tree isn't in sync with the GLSAs.