$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugins-good.git /var/lib/mock/f40-build-2236739-53519/root/chroot_tmpdir/scmroot/gstreamer1-plugins-good
Cloning into '/var/lib/mock/f40-build-2236739-53519/root/chroot_tmpdir/scmroot/gstreamer1-plugins-good'...
$ git fetch origin e92072bd8aa2b956e91a630dfb4bcdf7b4d081b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugins-good
 * [new ref]         e92072bd8aa2b956e91a630dfb4bcdf7b4d081b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e92072b Merge branch 'rawhide' of ssh://pkgs.fedoraproject.org/rpms/gstreamer1-plugins-good into rawhide