Fragile coding practices

[AnrDaemon]

The code like

	grep $short_refname "$GIT_DIR/locked"
	if [ $? -eq 0 ] ; then

is fragile - it is prone to break on future refactoring. Also, it contains TWO other issues.

Much cleaner is to directly write what you intend the code to do:

	if grep -F "$short_refname" "$GIT_DIR/locked"; then