update sanity check when parsing config

version.sh

@@ -2,7 +2,7 @@
 githash=`git rev-parse --short HEAD`
 branch=`git rev-parse --abbrev-ref HEAD`
 buildstamp=`date -u '+%Y-%m-%d_%H:%M:%S'`
-commits=`git rev-list --count master`
+commits=`git rev-list --count $branch`
 # Write out the package.
 cat << EOF > version.go
 // Code generated by version.sh (@generated) DO NOT EDIT.