$ git clone -n https://src.fedoraproject.org/rpms/vdr-osdteletext.git /var/lib/mock/f40-build-1518941-23913/root/chroot_tmpdir/scmroot/vdr-osdteletext
Cloning into '/var/lib/mock/f40-build-1518941-23913/root/chroot_tmpdir/scmroot/vdr-osdteletext'...
$ git fetch origin b0f7bcb38b30ed9af077ef3b71ed0e50a16bcd9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-osdteletext
 * [new ref]         b0f7bcb38b30ed9af077ef3b71ed0e50a16bcd9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0f7bcb Rebuilt for new VDR API version 2.6.8