$ git clone -n https://src.fedoraproject.org/rpms/embree3.git /var/lib/mock/f42-build-3364912-45045/root/chroot_tmpdir/scmroot/embree3
Cloning into '/var/lib/mock/f42-build-3364912-45045/root/chroot_tmpdir/scmroot/embree3'...
$ git fetch origin ce8f50886c7403bf553a13589ffe67aaabf2705c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/embree3
 * [new ref]         ce8f50886c7403bf553a13589ffe67aaabf2705c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce8f508 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild