I am confused. Do you really want an anonymous scalar?
You want to have several references to a scalar and also
to be able to change the value of the scalar independently
(not via the references). If so, you need to name that scalar
with a scalar variable and it won't be anonymous.
Anyway, what's wrong with a straight reference to a scalar?
$v = "something";
$ref1 = \$v;
$ref2 = \$v;
# both $ref1 and $ref2 point to the same variable.
# change the value
$v = "something else"; # both $ref1 and $ref2 will point to the change
$v2 = "new value";
$ref1 = \v2; # $ref2 now points to a new variable
# $ref2 will continue to point to $v
Have I totally misunderstood your question?