junegunn/fzf 0.40.0 on GitHub

Added zero event that is triggered when there's no match

New actions

Added track action which makes fzf track the current item when the
search result is updated. If the user manually moves the cursor, or the
item is not in the updated search result, tracking is automatically
disabled. Tracking is useful when you want to see the surrounding items
by deleting the query string.

# Narrow down the list with a query, point to a command,
# and hit CTRL-T to see its surrounding commands.
export FZF_CTRL_R_OPTS="
  --preview 'echo {}' --preview-window up:3:hidden:wrap
  --bind 'ctrl-/:toggle-preview'
  --bind 'ctrl-t:track+clear-query'
  --bind 'ctrl-y:execute-silent(echo -n {2..} | pbcopy)+abort'
  --color header:italic
  --header 'Press CTRL-Y to copy command into clipboard'"

Added change-header(...)
Added transform-header(...)
Added toggle-track action

Fixed --track behavior when used with --tac
- However, using --track with --tac is not recommended. The resulting
  behavior can be very confusing.
Bug fixes and improvements