$ git clone -n https://src.fedoraproject.org/rpms/coin-or-FlopC++.git /var/lib/mock/f40-build-788605-135267/root/chroot_tmpdir/scmroot/coin-or-FlopC++
Cloning into '/var/lib/mock/f40-build-788605-135267/root/chroot_tmpdir/scmroot/coin-or-FlopC++'...
$ git fetch origin 2d2ec2a1ce24c4662e4058db4ba7cbaf0dbec1a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coin-or-FlopC++
 * [new ref]         2d2ec2a1ce24c4662e4058db4ba7cbaf0dbec1a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d2ec2a Stop building for 32-bit x86