C.R.: oacs-4-6 is the branch, not a tag. After 4.6.2 is released there will be another tag for it on that branch, but I don't think oacs-4-6-2-b2 will be moved forward. After that release development will continue on that branch (although not that much as until now I guess), meaning you would get the new stuff when specifiying oacs-4-6.
But until that release oacs-4-6 is what will eventually become oacs-4-6-2, yes.
