$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-gl.git /var/lib/mock/f39-build-2264597-54542/root/chroot_tmpdir/scmroot/rust-gstreamer-gl
Cloning into '/var/lib/mock/f39-build-2264597-54542/root/chroot_tmpdir/scmroot/rust-gstreamer-gl'...
$ git fetch origin 2d2d6597a291717035ca6c2619d9555d694fa81e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-gl
 * [new ref]         2d2d6597a291717035ca6c2619d9555d694fa81e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d2d659 Update to version 0.21.2; Fixes RHBZ#2249235