$ git clone -n https://src.fedoraproject.org/rpms/openchange.git /var/lib/mock/f42-build-side-1-3584780-46896/root/chroot_tmpdir/scmroot/openchange
Cloning into '/var/lib/mock/f42-build-side-1-3584780-46896/root/chroot_tmpdir/scmroot/openchange'...
$ git fetch origin a7822d6901a013e59fa6ed15e1830c6bc5aef9a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openchange
 * [new ref]         a7822d6901a013e59fa6ed15e1830c6bc5aef9a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7822d6 Define SOURCE4_LIBRPC_INTERNALS to not need to change the code