refactor(git): gitlog as gitlog:// URI singleton, fix synthetic-URI cwd resolve

lua/git/repo.lua

@@ -84,14 +84,15 @@ function M.resolve(path)
     return vim.fs.normalize(gitdir), worktree
 end
 
----Resolve the gitdir/worktree from the current buffer's file path, falling
----back to `vim.fn.getcwd()` when the buffer is unnamed. Returns nil for
----both when not inside a git repo.
+---Resolve the gitdir/worktree from the current buffer's file path,
+---falling back to `vim.fn.getcwd()` when the buffer is unnamed or
+---carries a synthetic URI (`git://`, `gitlog://`) that isn't a real
+---filesystem path. Returns nil for both when not inside a git repo.
 ---@return string? gitdir
 ---@return string? worktree
 function M.resolve_cwd()
     local path = vim.api.nvim_buf_get_name(0)
-    if path == "" then
+    if path == "" or path:match("^%a+://") then
         path = vim.fn.getcwd()
     end
     return M.resolve(path)