• git keeps a record of when the tips of branches and other references were updated in the repo.
• You can check the log of HEAD —> go to .git folder and move to logs. In logs you will find HEAD
• git only keeps reflogs on your local activity. They are not shared with collaborators.
• Reflogs also expire. Git cleans out old entries after around 90 days, though this can be configured.
• git reflog accepts show, expire, delete and exists.
• show is the only commonly used variant and it is default sub command.
• git reflog show HEAD or git reflog show HEAD@{10} shows the logs.
• Time Based Reflog:
  • git reflog master @{one.week.ago}
  • git checkout bugfix@{2.days.ago} or yesterday or 3.minutes.ago