$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-gl-sys.git /var/lib/mock/f40-build-2250748-54080/root/chroot_tmpdir/scmroot/rust-gstreamer-gl-sys
Cloning into '/var/lib/mock/f40-build-2250748-54080/root/chroot_tmpdir/scmroot/rust-gstreamer-gl-sys'...
$ git fetch origin 14577e9cf0463d2fbe5728926fbb12d1e58d8253:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-gl-sys
 * [new ref]         14577e9cf0463d2fbe5728926fbb12d1e58d8253 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14577e9 Update to version 0.21.2; Fixes RHBZ#2249237