$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-video.git /var/lib/mock/f45-build-42225-791/root/chroot_tmpdir/scmroot/rust-gstreamer-video
Cloning into '/var/lib/mock/f45-build-42225-791/root/chroot_tmpdir/scmroot/rust-gstreamer-video'...
$ git fetch origin 01170e94efc0ffc0646fec352c3d67fd6dfcfe41:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-video
 * [new ref]         01170e94efc0ffc0646fec352c3d67fd6dfcfe41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01170e9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild