$ cd libraries/cmake/source/libiptables/src
$ git reset --hard 
$ git clean -xfdf
$ git status | head -6
HEAD detached at 1447b151
Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   extensions/libip6t_HL.c
	modified:   extensions/libip6t_HL.man