$ git clone -n https://src.fedoraproject.org/rpms/znc-clientbuffer.git /var/lib/mock/f41-build-856588-167686/root/chroot_tmpdir/scmroot/znc-clientbuffer
Cloning into '/var/lib/mock/f41-build-856588-167686/root/chroot_tmpdir/scmroot/znc-clientbuffer'...
$ git fetch origin d66eae3d95a7792b82d304b99c88f2465de52392:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/znc-clientbuffer
 * [new ref]         d66eae3d95a7792b82d304b99c88f2465de52392 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d66eae3 new znc-buildmod needs cmake/python