misc: update script

fix_head.bat

@@ -1,5 +0,0 @@
-git update-ref -d refs/remotes/origin/HEAD
-git remote prune origin
-git fetch origin
-git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/main
-git remote show origin

fix_head.sh

@@ -0,0 +1,2 @@
+rm -f .git/refs/remotes/origin/HEAD
+git remote prune origin