git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at b1d2190 avutil/riscv: Include unistd.h for musl Linux
b1d2190f5f8430fce061da0cc33dcf8f1c3922d1