The ornamental design for a scarfretainer, as shown and described.
FIG. 1 is a front perspective view of a scarf retainer showing my new
design, the broken line showing is for illustrating environmental elements
only and forms no part of the claimed design;
FIG. 2 is a top plan view thereof; and,
FIG. 3 is a side elevational view thereof, the opposite side being a mirror
image.
The bottom view of the design is not shown and would not depict any aspect
of the invention not already shown in the figures.