$ git clone -n https://src.fedoraproject.org/rpms/cups-filters.git /var/lib/mock/f40-build-2207552-52086/root/chroot_tmpdir/scmroot/cups-filters
Cloning into '/var/lib/mock/f40-build-2207552-52086/root/chroot_tmpdir/scmroot/cups-filters'...
$ git fetch origin 7883e3153a47291e24ffe29947503ef0b36ec6f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cups-filters
 * [new ref]         7883e3153a47291e24ffe29947503ef0b36ec6f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7883e31 make driverless subpackage require avahi and ipptool - they don't