Initialize a git repository afterwards with separate commits based on the file modified timestamp. Simple run git init && git afterwards

git-afterwards

#!/bin/bash
IFS=$(echo -en "\n\b")

# Ensure we are in a git repo with gitignore.
if [ ! -d .git ];       then echo "Current working directory is not a git repository."; exit -1; fi
#if [ ! -f .gitignore ]; then echo "Current working directory has no .gitignore file.";  exit -2; fi

# Sort (by date) and save new files
for file in `git status --porcelain --untracked-files=all | grep -v '.log$' | grep '^?? ' | sed 's/^?? //g'`
do
	echo `stat -f '%m' "$file"` $file
done | sort > .gitinit.log

# Add and commit the files
while read line
do
	date=`echo $line | sed 's/ .*//g'`
	file=`echo $line | sed 's/^[0-9]\{10\} //g'`
	git add "$file"
	GIT_AUTHOR_DATE=$date GIT_COMMITTER_DATE=$date git commit -m "$file"
done < .gitinit.log
rm .gitinit.log