$ git clone -n https://src.fedoraproject.org/rpms/embree3.git /var/lib/mock/f38-build-side-42-init-devel-725336-27318/root/chroot_tmpdir/scmroot/embree3
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-725336-27318/root/chroot_tmpdir/scmroot/embree3'...
$ git fetch origin 1c9514e4c38e526c1b4c566059f2271eb5756a85:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/embree3
 * [new ref]         1c9514e4c38e526c1b4c566059f2271eb5756a85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c9514e Port required ISA changes for ospray