$ git clone -n https://src.fedoraproject.org/rpms/binutils.git /var/lib/mock/f41-build-812308-147785/root/chroot_tmpdir/scmroot/binutils
Cloning into '/var/lib/mock/f41-build-812308-147785/root/chroot_tmpdir/scmroot/binutils'...
$ git fetch origin c0e2cc5ed5f1f3adde2738effe67a1ec978912ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/binutils
 * [new ref]         c0e2cc5ed5f1f3adde2738effe67a1ec978912ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0e2cc5  Rebase to commit cc80485f45c.  (Which brings in RELR support for the AArch64).