A note on tricky Git commands

Check the changes on a specific function [1]
git log -L :myfunction:path/to/myfile.c
Commit with a specified date
git commit --amend --date="Wed Feb 16 14:00 2011 +0100" --no-edit
Rebase while keeping commit date as the author date
git rebase --committer-date-is-author-date -i <commit>
Reset the commit date to the author date from a certain commit to the latest commit
git filter-branch -f --env-filter 'export GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"' <commit>..HEAD
Restore file from old commit
git checkout <commit> -- <path/to/file>
Delete files and dirs that are not tracked
git clean -fd (git clean -i for interactive delete)