Vim uses a jump list to track all they jumps you've made during a session. Vim can even be configured to keep a record of those jumps between sessions. This is really handy for a long-lived project, but what if you want those jumps cleared out?
You can clear them out for the current and subsequent windows using
:clearjumps. The jump list for existing windows will be unchanged and once
you start a new session, the full jump list will be restored.
See :h :clearjumps for more details.