$ git clone -n https://src.fedoraproject.org/rpms/vapoursynth.git /var/lib/mock/f40-build-788962-135466/root/chroot_tmpdir/scmroot/vapoursynth
Cloning into '/var/lib/mock/f40-build-788962-135466/root/chroot_tmpdir/scmroot/vapoursynth'...
$ git fetch origin bbaa813951d34ac8a94b73e86d341178e2646af3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vapoursynth
 * [new ref]         bbaa813951d34ac8a94b73e86d341178e2646af3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bbaa813 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild