$ git clone -n http://fedora.riscv.rocks:3000/rpms/ffmpeg.git /var/lib/mock/f41-build-808111-145671/root/chroot_tmpdir/scmroot/ffmpeg
Cloning into '/var/lib/mock/f41-build-808111-145671/root/chroot_tmpdir/scmroot/ffmpeg'...
$ git fetch origin c933ba5476a5cc401a6fe0c354c19bd9fa9b7ba3:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/ffmpeg
 * [new ref]         c933ba5476a5cc401a6fe0c354c19bd9fa9b7ba3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c933ba5 Bootstrap (riscv64)