$ git clone -n https://src.fedoraproject.org/rpms/coin-or-Couenne.git /var/lib/mock/f41-build-856650-167731/root/chroot_tmpdir/scmroot/coin-or-Couenne
Cloning into '/var/lib/mock/f41-build-856650-167731/root/chroot_tmpdir/scmroot/coin-or-Couenne'...
$ git fetch origin 058b364fe8fd35a647388fe218c3fdfb10554cc6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coin-or-Couenne
 * [new ref]         058b364fe8fd35a647388fe218c3fdfb10554cc6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 058b364 Rebuild for nauty 2.8.9