$ git clone -n https://src.fedoraproject.org/rpms/OpenColorIO.git /var/lib/mock/f39-build-1985577-43352/root/chroot_tmpdir/scmroot/OpenColorIO
Cloning into '/var/lib/mock/f39-build-1985577-43352/root/chroot_tmpdir/scmroot/OpenColorIO'...
$ git fetch origin 7a7e9b9439e910fdcc97d0e01f188531a2852eab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/OpenColorIO
 * [new ref]         7a7e9b9439e910fdcc97d0e01f188531a2852eab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a7e9b9 Remove old patches.