$ git clone -n https://src.fedoraproject.org/rpms/rust-ron0.7.git /var/lib/mock/f45-build-44479-814/root/chroot_tmpdir/scmroot/rust-ron0.7
Cloning into '/var/lib/mock/f45-build-44479-814/root/chroot_tmpdir/scmroot/rust-ron0.7'...
$ git fetch origin e4f286484a5a2dc263352439a2bdcb40b20761ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ron0.7
 * [new ref]         e4f286484a5a2dc263352439a2bdcb40b20761ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4f2864 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild