$ git clone -n https://src.fedoraproject.org/rpms/rust-rxml_validation.git /var/lib/mock/f45-build-44634-815/root/chroot_tmpdir/scmroot/rust-rxml_validation
Cloning into '/var/lib/mock/f45-build-44634-815/root/chroot_tmpdir/scmroot/rust-rxml_validation'...
$ git fetch origin a3348f83a43d51cfd3b4cdb1353cec357fd62f9c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rxml_validation
 * [new ref]         a3348f83a43d51cfd3b4cdb1353cec357fd62f9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3348f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild