$ git clone -n https://src.fedoraproject.org/rpms/vdr-streamdev.git /var/lib/mock/f40-build-794878-139798/root/chroot_tmpdir/scmroot/vdr-streamdev
Cloning into '/var/lib/mock/f40-build-794878-139798/root/chroot_tmpdir/scmroot/vdr-streamdev'...
$ git fetch origin ec38a13bc069a17c635ddd685ac8bba3449aed10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-streamdev
 * [new ref]         ec38a13bc069a17c635ddd685ac8bba3449aed10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec38a13 Rebuilt for new VDR API version