$ git clone -n https://src.fedoraproject.org/rpms/coin-or-Cbc.git /var/lib/mock/f42-build-864977-172700/root/chroot_tmpdir/scmroot/coin-or-Cbc
Cloning into '/var/lib/mock/f42-build-864977-172700/root/chroot_tmpdir/scmroot/coin-or-Cbc'...
$ git fetch origin 890caa0531b1120fa6fa3915a9274f2179cae016:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coin-or-Cbc
 * [new ref]         890caa0531b1120fa6fa3915a9274f2179cae016 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 890caa0 Renaming of /usr/bin/cbc file (rhbz#2335063)