Updating suckless tools
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1.  git remote add suckless-{tool} url
2.  git checkout -b copy
3.  git fetch suckless-{tool} master
4.  git rm -rf {tool}/
5.  git read-tree --prefix={tool} -u suckless-{tool}/master
6.  git reset -- {tool}/config.h
7.  git restore {tool}/config.h
8.  git commit -m "..."
9.  git checkout master
10. git merge --no-commit --no-ff copy
11. git reset HEAD # check changes
12. git add .
13. git commit -m "..."
14. git branch -D copy