$ git clone -n https://src.fedoraproject.org/rpms/binutils.git /var/lib/mock/f45-build-336-190/root/chroot_tmpdir/scmroot/binutils
Cloning into '/var/lib/mock/f45-build-336-190/root/chroot_tmpdir/scmroot/binutils'...
$ git fetch origin 5119f9a9cd87fe6d021b6c959ee7d4812d0cf5c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/binutils
 * [new ref]         5119f9a9cd87fe6d021b6c959ee7d4812d0cf5c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5119f9a Rebase to the 2.47 GNU Binutils release.