Keep Git Reflog Indefinitely?
Caveat: reflogs are local and are not sent/received with push/pull operations.
Cons: reflogs may result in (otherwise) unreachable snapshots (and consequently blobs) being kept around, growing your repo to larger sizes than might be desirable. Look at gc.reflogexpireunreachable for something that may help in this respect.
Two configuration settings govern the expiration of reflog entries:
gc.reflogexpire,gc.<pattern>.reflogexpiregit reflog expire removes reflog entries older than this time; defaults to 90 days. With "<pattern>" (e.g. "refs/stash") in the middle the setting applies only to the refs that match the .
gc.reflogexpireunreachable,gc.<ref>.reflogexpireunreachablegit reflog expire removes reflog entries older than this time and are not reachable from the current tip; defaults to 30 days. With "<pattern>" (e.g. "refs/stash") in the middle, the setting applies only to the refs that match the <pattern>.