$ git clone -n https://src.fedoraproject.org/rpms/coin-or-Bonmin.git /var/lib/mock/f40-build-788599-135267/root/chroot_tmpdir/scmroot/coin-or-Bonmin
Cloning into '/var/lib/mock/f40-build-788599-135267/root/chroot_tmpdir/scmroot/coin-or-Bonmin'...
$ git fetch origin dfc950606f3b4e4e801b2abc22f1a95980571c2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coin-or-Bonmin
 * [new ref]         dfc950606f3b4e4e801b2abc22f1a95980571c2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dfc9506 Release 1.8.9