$ git clone -n https://src.fedoraproject.org/rpms/OpenColorIO.git /var/lib/mock/f42-build-side-1-3500321-45970/root/chroot_tmpdir/scmroot/OpenColorIO
Cloning into '/var/lib/mock/f42-build-side-1-3500321-45970/root/chroot_tmpdir/scmroot/OpenColorIO'...
$ git fetch origin 6f422fcbdcf1848dbf277c07f3fbeb055c4247a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/OpenColorIO
 * [new ref]         6f422fcbdcf1848dbf277c07f3fbeb055c4247a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f422fc Update to 2.4.2.