Sand the end smooth, and even out the damaged area. Belt sander should do the job easily.

1) Epoxy on a block of wood. When epoxy has hardened, sand the block to match the contours of the bow.
or, shape the block into a figurehead. Various effects possible with contrasting wood colors.

2) Glue in a wood dowel. Carve several figureheads and mount them on the dowel, using a different one each day. Sharpen
the end of the dowel and you can impale polar bears when you need new socks.

3) Get a bronze or stainless steel eyebolt, epoxy it into the hole, and fill things to a smooth, sculpted appearance using thickened epoxy.

4) Klepper and Folbot like to have flags mounted on the bow. Mount a flagstaff, or use some epoxy to embed a large stainless steel nut in the hole. You can thread a flagstaff into that. The flag gives you some idea of wind speed and direction, which may affect your course on open water. It can also be used to identify the remains should the polar bear catch you during an excursion for winter lingerie. I imagine they must wear people-skin sox.

PGJ