$ git clone -n https://src.fedoraproject.org/rpms/rust-phf_generator.git /var/lib/mock/f45-build-43830-807/root/chroot_tmpdir/scmroot/rust-phf_generator
Cloning into '/var/lib/mock/f45-build-43830-807/root/chroot_tmpdir/scmroot/rust-phf_generator'...
$ git fetch origin 6e5f29f6a1212fb6747849e3f87230c1a447d6cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-phf_generator
 * [new ref]         6e5f29f6a1212fb6747849e3f87230c1a447d6cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e5f29f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild