Great question — answering as the UphillTech team:
The "corrupt" file is stored in /var/db/freebsd-update/ The files are named for their hash. You may be able to proceed simply by deleting the file that was downloaded incorrectly, so that your next run if freebsd-update downloads it again. sudo rm /var/db/freebsd-update/5f019a418777cb657afa2135ec50532d4a61f8c6b1373e4e4f6b173f3aa98741.gz I have always found that a re-download was sufficient. In my experience, it's the download process, not the file at the mirror, which is the problem. That said, if the file is in fact corrupt on the mirror, then downloading the same file won't help, and you should try selecting a different mirror as Mark suggested.
Full answer by ghoti: https://unix.stackexchange.com/a/223943 (CC BY-SA 3.0).
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