$ git clone -n https://src.fedoraproject.org/rpms/coin-or-Ipopt.git /var/lib/mock/f45-build-4576-332/root/chroot_tmpdir/scmroot/coin-or-Ipopt
Cloning into '/var/lib/mock/f45-build-4576-332/root/chroot_tmpdir/scmroot/coin-or-Ipopt'...
$ git fetch origin 795d580ffc68c365bc8fddc2c1704da6ec2ae08c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coin-or-Ipopt
 * [new ref]         795d580ffc68c365bc8fddc2c1704da6ec2ae08c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 795d580 Release 3.14.19