The ornamental design for a golf club head, as shown and described.
FIG. 1 is an elevational view of the claimed design. The phantom lines in the drawing figures form no part of the claimed design, but are intended to illustrate the environment of the inventive design shown in solid black demarcations.
The drawing of this application illustrates, in dotted, phantom lines, a rear view of a golf club head having inventive, two or three dimensional design elements shown in solid black demarcations.