$ git clone -n https://src.fedoraproject.org/rpms/waifu2x-converter-cpp.git /var/lib/mock/f40-build-2521536-61799/root/chroot_tmpdir/scmroot/waifu2x-converter-cpp
Cloning into '/var/lib/mock/f40-build-2521536-61799/root/chroot_tmpdir/scmroot/waifu2x-converter-cpp'...
$ git fetch origin 2db3926a133a077bc9c7d1cc61370d44db51aaa0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/waifu2x-converter-cpp
 * [new ref]         2db3926a133a077bc9c7d1cc61370d44db51aaa0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2db3926 Rebuild for opencv 4.9.0