git post-commit hook to simulate revision numbers in current branch and replace $Revision$ with current number in all *.sql files. Please rename to "pre-commit" and place it into .git/hooks/ directory.

pre-commit.php

#!/usr/bin/php
<?php

$output = array();

$rootDirCurrent = getcwd();

exec('git rev-parse --show-toplevel',$rootDir);
$rootDir = implode($rootDir);
chdir($rootDir);

exec('git rev-list HEAD | wc -l',$revision);

$newRevision = intval(implode($revision)) + 1;

exec('git diff-index --cached --name-only HEAD',$output);

$needle       = '/(.sql)$/';
$exit_status = 0;

foreach ($output as $file) {
    if (!preg_match($needle, $file)) {
        // only check .sql files
        continue;
    }
    $inputFile = file_get_contents($file);
    $outputFile = preg_replace("/\\\$Revision\\\$/", "\$Revision: " . $newRevision . "\\\$", $inputFile);
    file_put_contents($file, $outputFile);
    exec('git add ' . $file);
}

chdir($rootDirCurrent);

exit($exit_status);