$ git clone -n https://src.fedoraproject.org/rpms/coin-or-Cbc.git /var/lib/mock/f33-build-277393-51663/root/chroot_tmpdir/scmroot/coin-or-Cbc
Cloning into '/var/lib/mock/f33-build-277393-51663/root/chroot_tmpdir/scmroot/coin-or-Cbc'...
$ git reset --hard 2c24a4f1466277e4b6f06aa4e464b31d1fcdeb24
HEAD is now at 2c24a4f Rebuild for nauty 2.7.1.