$ git clone -n https://src.fedoraproject.org/rpms/binutils.git /var/lib/mock/f41-build-46-31/root/chroot_tmpdir/scmroot/binutils
Cloning into '/var/lib/mock/f41-build-46-31/root/chroot_tmpdir/scmroot/binutils'...
$ git fetch origin 92824e7d5636767552be9bbe0175dbff0b3ea1c0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/binutils
 * [new ref]         92824e7d5636767552be9bbe0175dbff0b3ea1c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92824e7 Rebase to commit a73073dc7f23ab37ae33402fbb38c8314bcbea3e