diff --git a/git-mtime b/git-mtime
index cdbd02b..1bc23e7 100755
--- a/git-mtime
+++ b/git-mtime
@@ -2,3 +2,4 @@
 git log --name-only --date=iso --reverse --pretty=format:%at "$@"\
 | perl -00ln -e '($d,@f)=split/\n/;$d{$_}=$d for grep{-e}@f' \
              -e '}{utime undef,$d{$_},$_ for keys%d'
+find -name '.git*' -prune -o -type d -exec sh -c 'touch -r $(ls -1rtd {}/* | tail -1) {}' \;