Perhaps JoltTransformRecord could help you.

The jolt transformation "shift" let's you rename fields - in a csv file's case, headers.

If you know all your replaces ahead of time, you could define a transformation like:

{

operation: shift

spec: {

    "kgg":"g",

    "c34":"c",

    "*":"&"

    }

}

Note the last shift, "*":"&" ,  which would transfer over the rest of the headers you didn't specifically rename.