$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-gl-sys.git /var/lib/mock/f39-build-1643377-40234/root/chroot_tmpdir/scmroot/rust-gstreamer-gl-sys
Cloning into '/var/lib/mock/f39-build-1643377-40234/root/chroot_tmpdir/scmroot/rust-gstreamer-gl-sys'...
$ git fetch origin 02031f28decdfcb5023586e5b9287930ee659450:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-gl-sys
 * [new ref]         02031f28decdfcb5023586e5b9287930ee659450 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02031f2 Update to version 0.21.1; Fixes RHBZ#2242110