$Revision$ keyword replacement?

Hello:

        I'm looking for a $Revision$ replacement. I know, in git all that
        matters are the contents. So the equivalent in git could be:

        How similar this file is to the file $path in these commit(s)?

        What I use now is an ugly shell script (as you might known
        I'm not a C programer), see the attatchment.

        So I get:

311bf741d16ee5d0166639a4fafd9194e504aad3:R094   introduccio.tex sim.tex
b764ee049289f5157238596cccc7a4e15f23896c:R094   introduccio.tex sim.tex
f293e1ab1dfb7ff60cb269ed5b18f9222099a752:R098   introduccio.tex sim.tex
f14c4b2d6799354d376e2026a5b7a85ccce48284:R098   introduccio.tex sim.tex
183af55606310218ca0e9a735dad0827acea7910:R098   introduccio.tex sim.tex
73fd2531cce3db0ca804577fb29f87f413fc4563:R096   introduccio.tex sim.tex

        Do you know any other (or better :) way to do it?

        Thanks

        Santi