$ git clone -n https://src.fedoraproject.org/rpms/gstreamer1-plugins-base.git /var/lib/mock/f42-build-865321-173016/root/chroot_tmpdir/scmroot/gstreamer1-plugins-base
Cloning into '/var/lib/mock/f42-build-865321-173016/root/chroot_tmpdir/scmroot/gstreamer1-plugins-base'...
$ git fetch origin 0cda5bc995f9b5853c9423ba66bb3694134b8b48:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gstreamer1-plugins-base
 * [new ref]         0cda5bc995f9b5853c9423ba66bb3694134b8b48 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cda5bc 1.24.11