$ git clone -n https://src.fedoraproject.org/rpms/openttd-opengfx.git /var/lib/mock/f41-build-side-1-3131223-39611/root/chroot_tmpdir/scmroot/openttd-opengfx
Cloning into '/var/lib/mock/f41-build-side-1-3131223-39611/root/chroot_tmpdir/scmroot/openttd-opengfx'...
$ git fetch origin 04666e706fe3865bc3c9ab828b15da03c50e55e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openttd-opengfx
 * [new ref]         04666e706fe3865bc3c9ab828b15da03c50e55e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04666e7 Fix build with gimp-3