Undo a hard reset
Your agent ran reset --hard. The commits are still there.
The reflog records every position HEAD and each branch has held, with a note of what moved it. It is local, it is not pushed, and it is the first place to look when something has vanished.
HEAD@{1} is where HEAD was one move ago. git reset --hard HEAD@{1} therefore undoes the last thing that moved it — including a reset.
This works because moving a branch does not delete commits. Nothing is removed from the object store until a garbage collection, and until then everything is one command away.
Commands in this lesson
git reflog- Show every position a ref has held, and what moved it there
git reset --hard- Move the branch and overwrite the index and your files — the one that loses work