Tags give the ability to mark specific points in history as being important
"(packaging) tag 4.10.6 at 7e9a4bb88"
"5.0.0"
"(packaging) tag puppet 4.10.4 at 8a1be188"
"(PUP-7669) Tag puppet 4.10.3 at 8d7ba087a3"
puppet Debian release 3.7.2-4+deb8u1~bpo70+1
puppet Debian release 4.8.2-5~bpo8+1