$ git clone -n https://src.fedoraproject.org/rpms/rust-clru.git /var/lib/mock/f45-build-40845-776/root/chroot_tmpdir/scmroot/rust-clru
Cloning into '/var/lib/mock/f45-build-40845-776/root/chroot_tmpdir/scmroot/rust-clru'...
$ git fetch origin b20e5b6c5ad40e3535c78e7fcf2d7404c4e8ee45:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clru
 * [new ref]         b20e5b6c5ad40e3535c78e7fcf2d7404c4e8ee45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b20e5b6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild