How do I get it? ---The release itself is a source package, however a safer choice is to get the release binaries through your Linux distributor. Fortunately, there have been distributions who have been shipping it as early as three weeks ago.
In case it saves someone else a few minutes: for Fedora 21 (and probably others). (At your own risk if new version of binutils breaks something else).
yum install fedora-repos-rawhide yum install binutils --enablerepo rawhide objdump -v