$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugins-bad-free.git /var/lib/mock/f40-build-788062-134983/root/chroot_tmpdir/scmroot/gstreamer1-plugins-bad-free
Cloning into '/var/lib/mock/f40-build-788062-134983/root/chroot_tmpdir/scmroot/gstreamer1-plugins-bad-free'...
$ git fetch origin 28d1fd8403d45807fc47153da2c5c41160b7014a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugins-bad-free
 * [new ref]         28d1fd8403d45807fc47153da2c5c41160b7014a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28d1fd8 Add conditionals for only building openh264 support on F40+ for now