$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-gl /var/lib/mock/f42-build-3429008-45391/root/chroot_tmpdir/scmroot/rust-gstreamer-gl
Cloning into '/var/lib/mock/f42-build-3429008-45391/root/chroot_tmpdir/scmroot/rust-gstreamer-gl'...
$ git fetch origin 885ddd3210810b3379ca077a1b7d1889f8c7bdd7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-gl
 * [new ref]         885ddd3210810b3379ca077a1b7d1889f8c7bdd7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 885ddd3 Update to version 0.23.5; Fixes RHBZ#2333667