[feature request] git: tags instead of commit IDs in blame output

Hi there,

I have a feature request for git. In the output of "git blame", I would
like to be able to see tags instead of commit IDs in front of each
line. Basically, I would like to know the first tag which was added
after the last change of every line. Icing on the cake would be the
possibility to filter out some tags (for example to ignore release
candidate tags) but I could easily live without that.

Does it make sense?
Would it be difficult to implement?

At the moment I am using a custom tool when I need to see this output,
but being backed-up by quilt, it's quite slow and disk-consuming. I
would love to be able to get rid of it and use only git.

Thanks,
-- 
Jean Delvare