$ git clone -n https://src.fedoraproject.org/rpms/vdr-osdteletext.git /var/lib/mock/f40-build-1922749-25101/root/chroot_tmpdir/scmroot/vdr-osdteletext
Cloning into '/var/lib/mock/f40-build-1922749-25101/root/chroot_tmpdir/scmroot/vdr-osdteletext'...
$ git fetch origin d2273b2bb66ade49551bcec68adc8098b72c5084:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-osdteletext
 * [new ref]         d2273b2bb66ade49551bcec68adc8098b72c5084 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2273b2 Rebuilt for new VDR API version 2.6.9