справочник команд DNF (DNF Command Reference)
Указание операций (Specifying transactions)
<transaction-spec> can be in one of several forms. If it is an
integer, it specifies a transaction ID. Specifying last is the
same as specifying the ID of the most recent transaction. The
last form is last-<offset>, where <offset> is a positive integer.
It specifies offset-th transaction preceding the most recent
transaction.
