Merge branch 'en/keep-cwd' into maint

Fix a regression in 2.35 that roke the use of "rebase" and "stash"
in a secondary worktree.

* en/keep-cwd:
  sequencer, stash: fix running from worktree subdir

builtin/stash.c

@@ -1539,8 +1539,12 @@ static int do_push_stash(const struct pathspec *ps, const char *stash_msg, int q
 			struct child_process cp = CHILD_PROCESS_INIT;
 
 			cp.git_cmd = 1;
-			if (startup_info->original_cwd)
+			if (startup_info->original_cwd) {
 				cp.dir = startup_info->original_cwd;
+				strvec_pushf(&cp.env_array, "%s=%s",
+					     GIT_WORK_TREE_ENVIRONMENT,
+					     the_repository->worktree);
+			}
 			strvec_pushl(&cp.args, "clean", "--force",
 				     "--quiet", "-d", ":/", NULL);
 			if (include_untracked == INCLUDE_ALL_FILES)