<b_jonas> `` [[ 12529 == $(hg log --removed -l 1 -T "{rev}" /hackenv/wisdom/password) ]] && learn password \'The password of the month is consider us expert everything street.\'

`revert <rev>" can be used to revert to a revision. See <https://hack.esolangs.org/repo/>. It is a builtin command so cannot be called from other commands.