$ git clone -n https://src.fedoraproject.org/rpms/opentoonz.git /var/lib/mock/f39-build-1541000-36480/root/chroot_tmpdir/scmroot/opentoonz
Cloning into '/var/lib/mock/f39-build-1541000-36480/root/chroot_tmpdir/scmroot/opentoonz'...
$ git fetch origin a45e3e27ee9102f4619d716c356b77cd012775a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opentoonz
 * [new ref]         a45e3e27ee9102f4619d716c356b77cd012775a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a45e3e2 Rebuild for opencv 4.8.0