$ git clone -n https://src.fedoraproject.org/rpms/binutils.git /var/lib/mock/f45-build-105-53/root/chroot_tmpdir/scmroot/binutils
Cloning into '/var/lib/mock/f45-build-105-53/root/chroot_tmpdir/scmroot/binutils'...
$ git fetch origin c5ce1de9807bb944a45abc60c1520fea67f4498a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/binutils
 * [new ref]         c5ce1de9807bb944a45abc60c1520fea67f4498a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5ce1de Rebase to commit f85ff0c4bce