$ git clone -n https://src.fedoraproject.org/rpms/waifu2x-converter-cpp.git /var/lib/mock/f39-build-1765306-41501/root/chroot_tmpdir/scmroot/waifu2x-converter-cpp
Cloning into '/var/lib/mock/f39-build-1765306-41501/root/chroot_tmpdir/scmroot/waifu2x-converter-cpp'...
$ git fetch origin b63eae7702bca2782ae0be9082e33de0053cacd2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/waifu2x-converter-cpp
 * [new ref]         b63eae7702bca2782ae0be9082e33de0053cacd2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b63eae7 Rebuild for opencv 4.8.0