$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugins-base.git /var/lib/mock/f41-build-846114-162967/root/chroot_tmpdir/scmroot/gstreamer1-plugins-base
Cloning into '/var/lib/mock/f41-build-846114-162967/root/chroot_tmpdir/scmroot/gstreamer1-plugins-base'...
$ git fetch origin 1415740e2adc6bb4de0cea5650e94eed8e0c7075:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugins-base
 * [new ref]         1415740e2adc6bb4de0cea5650e94eed8e0c7075 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1415740 1.24.7