Find most changed files in Git repo

Somewhere I've read that the files you change most often are most likely the ones that are doing too much and should be refactored into smaller ones.

With a bit of googling, I've landed on this one-liner

# Shows most 100 changed files in last year in current branch
# --pretty=format:<empty> is a workaround to hide the commit message and show only file names
git log --name-only --since="last year" --pretty=format: | sort | uniq -c | sort -rg | head -100

You can also throw in grep to narrow down the results for a specific filetype or path.

# Only JavaScript files (.js extension)
git log --name-only --since="last year" --pretty=format: | grep .js$ | sort | uniq -c | sort -rg | head -100