Easy git-squash (merges last N commits in one)

git-squash.bat

@echo off

if "%1"=="" goto blank

echo Squashing %1 commits...
git reset --soft HEAD~%1
git log --format=%%B%%n --reverse "HEAD@{1}" -n %1 > _msg.txt
git commit -t _msg.txt
del _msg.txt
echo Done!
goto end

:blank
echo Missing parameter: number of commits to squash.
exit /B 1

:end

git-squash.sh

#!/bin/bash

if [ $# -ne 1 ]; then
    echo "Missing parameter: number of commits to squash."
    exit 1
fi

echo "Squashing $1 commits..."
git reset --soft HEAD~$1
git log --format=%B%n --reverse "HEAD@{1}" -n $1 > _msg.txt
git commit -t _msg.txt
rm _msg.txt
echo "Done!"