try cmd instead of powershell

Author: tomdaley92

windows/makefile

@@ -19,7 +19,7 @@ VERSION = $(GITHUB_REF_NAME)
 !ENDIF
 
 # Git commit hash (unique identifier for build)
-!IF [powershell -NoProfile -Command "$$hash = git rev-parse --short HEAD 2>$$null; if ($$hash) { Set-Content -Path .hash.tmp -Value ""COMMIT_HASH = $$hash"" -NoNewline; exit 0 } else { exit 1 }"] == 0
+!IF [cmd /c "for /f %i in ('git rev-parse --short HEAD 2^>nul') do @echo COMMIT_HASH = %i > .hash.tmp 2^>nul && exit 0 || exit 1"] == 0
 !INCLUDE .hash.tmp
 !ELSE
 COMMIT_HASH = unknown