$ git clone -n https://src.fedoraproject.org/rpms/rust-ropey.git /var/lib/mock/f45-build-44480-814/root/chroot_tmpdir/scmroot/rust-ropey
Cloning into '/var/lib/mock/f45-build-44480-814/root/chroot_tmpdir/scmroot/rust-ropey'...
$ git fetch origin 34c49d49faf26c74c22805933009d398afa2c8d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ropey
 * [new ref]         34c49d49faf26c74c22805933009d398afa2c8d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34c49d4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild