The ornamental design for a fabricretainingtrack, as shown and described.
FIG. 1 is a perspective view of a fabric retaining track showing a new design;
FIG. 2 is a right side view thereof, the left side being a minor image;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a back elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a cross-section view taken on line 7-7 of FIG. 2.
A right side portion of the fabric retaining track is shown broken away from a left side portion of the fabric retaining track in FIGS. 1 and 3-7 of the drawings to indicate indeterminate length, it being understood that the fabric retaining track has a uniform shape and appearance through out its length.