$ git clone -n https://src.fedoraproject.org/rpms/cargo2rpm.git /var/lib/mock/f45-build-3877-327/root/chroot_tmpdir/scmroot/cargo2rpm
Cloning into '/var/lib/mock/f45-build-3877-327/root/chroot_tmpdir/scmroot/cargo2rpm'...
$ git fetch origin aa54648932fe87f9a3f7a9498a9a049b473ed25a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cargo2rpm
 * [new ref]         aa54648932fe87f9a3f7a9498a9a049b473ed25a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa54648 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild