$ git clone -n https://src.fedoraproject.org/rpms/rust-gstreamer-video-sys.git /var/lib/mock/f45-build-42191-791/root/chroot_tmpdir/scmroot/rust-gstreamer-video-sys
Cloning into '/var/lib/mock/f45-build-42191-791/root/chroot_tmpdir/scmroot/rust-gstreamer-video-sys'...
$ git fetch origin 153ac7207e16a2c98c99e452b13c82046f89225b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gstreamer-video-sys
 * [new ref]         153ac7207e16a2c98c99e452b13c82046f89225b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 153ac72 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild