$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-gl.git /var/lib/mock/f40-build-2176238-51078/root/chroot_tmpdir/scmroot/rust-gstreamer-gl
Cloning into '/var/lib/mock/f40-build-2176238-51078/root/chroot_tmpdir/scmroot/rust-gstreamer-gl'...
$ git fetch origin 7b930e0f2ac9b750bb90c01157b7378a5cf725ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-gl
 * [new ref]         7b930e0f2ac9b750bb90c01157b7378a5cf725ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b930e0 Update to version 0.21.1; Fixes RHBZ#2245484