$ git clone -n https://src.fedoraproject.org/rpms/vdr-osdteletext.git /var/lib/mock/f40-build-795282-140106/root/chroot_tmpdir/scmroot/vdr-osdteletext
Cloning into '/var/lib/mock/f40-build-795282-140106/root/chroot_tmpdir/scmroot/vdr-osdteletext'...
$ git fetch origin 1ad8cb3b5a8f5d02d9c880c335a04bde1c9d4636:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-osdteletext
 * [new ref]         1ad8cb3b5a8f5d02d9c880c335a04bde1c9d4636 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ad8cb3 Rebuilt for new VDR API version