Some tools will automatically ignore commits in a .git-blame-ignore-revs file. Git itself can "blame --ignore-rev <hash>" or "blame --ignore-revs-file <file>" since version 2.23.

  git commit -m "Autoformat source files"
  git log --format="# %s%n%H" -1 >> .git-blame-ignore-revs
  git add .git-blame-ignore-revs
  git commit -m "Ignore autoformat commit in blames"

  cat .git-blame-ignore-revs
  # Autoformat source files
  0a1b2c3d...

  git blame --ignore-revs-file .git-blame-ignore-revs code.src

  git config blame.ignoreRevsFile .git-blame-ignore-revs
  git blame code.src