$ git clone -n https://src.fedoraproject.org/rpms/embree.git /var/lib/mock/f41-build-856474-167627/root/chroot_tmpdir/scmroot/embree
Cloning into '/var/lib/mock/f41-build-856474-167627/root/chroot_tmpdir/scmroot/embree'...
$ git fetch origin 7917d0cda2e241237a82afa810992028812894f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/embree
 * [new ref]         7917d0cda2e241237a82afa810992028812894f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7917d0c Update to 4.3.3 (rhbz#2292486)