Git: Trying to recover a lost file version (after performing destructive changes e.g. rebasing, squashing, amending, etc)

gistfile1.sh

# create dir to put all file version found
mkdir target && cd target
# checkout all "lost" commits and save a file version for each of them
for i in `git reflog | head -75 | awk '{print $1}'`; do cat path_to_file > `git log -1 | head -1 | awk '{print $2}'`; done
# use fdupes to find duplicates, etc