$ git clone -n https://src.fedoraproject.org/rpms/rust-wild.git /var/lib/mock/f45-build-46235-832/root/chroot_tmpdir/scmroot/rust-wild
Cloning into '/var/lib/mock/f45-build-46235-832/root/chroot_tmpdir/scmroot/rust-wild'...
$ git fetch origin 437472e2a13dec0d73e453ffa2389890d66cf919:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wild
 * [new ref]         437472e2a13dec0d73e453ffa2389890d66cf919 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 437472e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild