x11-clocks/wlclock: unbreak fetch due to Git upgrade

> Fetched file size mismatch (expected 34225, actual 34332)

See also: https://github.com/git/git/commit/4f4be00d302b

(cherry picked from commit 73d474e3d2b5adbc7a6c57d39ce8a3bb61582f0b)