Cleaning up the git reflog

git--clean-up-reflog.txt

# Purge the reflog of anything farther back than 180 days, specifying --all, otherwise unreachable 'dangling' objects will be missed, 
# optional --expire-unreachable flag could differ on when to expire unreachables

git reflog expire --all --expire=180.days.ago --expire-unreachable=180.days.ago --all

# other examples for expire
--expire=now
--expire=never
--expire="Jan 01 2019"
--expire="2019-01-01 00:00"

# Pruning actually does the cleanup, after reflog expire marks the references as expired
# --prune=now means ignore the 90 day prune default and prune starting now

git gc --prune=now