$ git clone -n https://src.fedoraproject.org/rpms/coin-or-Ipopt.git /var/lib/mock/f40-build-2207479-52086/root/chroot_tmpdir/scmroot/coin-or-Ipopt
Cloning into '/var/lib/mock/f40-build-2207479-52086/root/chroot_tmpdir/scmroot/coin-or-Ipopt'...
$ git fetch origin 08ad273315b6e89ca587093105017a315e025ed5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coin-or-Ipopt
 * [new ref]         08ad273315b6e89ca587093105017a315e025ed5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08ad273 Rebuild for MUMPS-5.6.2