$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-video.git /var/lib/mock/f38-build-side-43-rust-devel-1401499-31169/root/chroot_tmpdir/scmroot/rust-gstreamer-video
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1401499-31169/root/chroot_tmpdir/scmroot/rust-gstreamer-video'...
$ git fetch origin 645f67113bb8e0d61de7a109b3ade90a15e5f417:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-video
 * [new ref]         645f67113bb8e0d61de7a109b3ade90a15e5f417 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 645f671 Update to 0.21.0