unpacking .rpm file?

[John Chambers]

Is there any way to simply unpack a .rpm file into  a  directory,  as
can  be  done  with tar?  I got some stuff as a foo.rpm file, and I'd
like to unpack it and make a few changes.   I  don't  want  (or  have
permissions) to overwrite anything in /usr/src/redhat, but that seems
to be about all that rpm is willing to do.   Digging  around  in  TFM
doesn't seem to give any clues ...

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