$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugins-good.git /var/lib/mock/f41-build-836240-158789/root/chroot_tmpdir/scmroot/gstreamer1-plugins-good
Cloning into '/var/lib/mock/f41-build-836240-158789/root/chroot_tmpdir/scmroot/gstreamer1-plugins-good'...
$ git fetch origin 1dedeffe0a406fedcc95807ef4b0c408a0beeea2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugins-good
 * [new ref]         1dedeffe0a406fedcc95807ef4b0c408a0beeea2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1dedeff 1.24.6