feat(git): give every new git window a fresh jumplist

lua/git/util.lua

@@ -82,8 +82,8 @@ end
 
 ---Place a buffer in the current window or a new split per `split`.
 ---`false` replaces the current buffer, dropping a `'` mark first so
----`''` jumps back. A direction string opens a leftabove split. Nil
----falls back to a `splitbelow`-aware horizontal split.
+---`''` jumps back. A direction string opens a split on that side. Nil
+---falls back to `'splitbelow'` for the direction.
 ---@param buf integer
 ---@param split (false|"above"|"below"|"left"|"right")?
 ---@return integer win
@@ -93,9 +93,11 @@ function M.place_buf(buf, split)
         vim.api.nvim_set_current_buf(buf)
         return vim.api.nvim_get_current_win()
     end
-    return vim.api.nvim_open_win(buf, true, {
+    local win = vim.api.nvim_open_win(buf, true, {
         split = split or (vim.o.splitbelow and "below" or "above"),
     })
+    vim.cmd("clearjumps")
+    return win
 end
 
 ---@class ow.Git.NewScratchOpts : ow.Git.ScratchOpts