It would be nice if there were option to list the SHA1 values easily for every tag:
$ git tag --sha # or -s short option
release/1.0 3a162d7086a7da0f9621530cca5996668d1442e3
snapshot/20100125 e7b2b55a1bc2e59b5bf4fc92bc5eaf8ec25031a3
...Jari