$ git clone -n https://src.fedoraproject.org/rpms/vdr-skinnopacity.git /var/lib/mock/f40-build-1922754-25101/root/chroot_tmpdir/scmroot/vdr-skinnopacity
Cloning into '/var/lib/mock/f40-build-1922754-25101/root/chroot_tmpdir/scmroot/vdr-skinnopacity'...
$ git fetch origin 28f9aa7dc52466af9bf49c6b03b4d321d46dcbb4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vdr-skinnopacity
 * [new ref]         28f9aa7dc52466af9bf49c6b03b4d321d46dcbb4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28f9aa7 Rebuilt for new VDR API version 2.6.9