$ git clone -n https://src.fedoraproject.org/rpms/nmon.git /var/lib/mock/f40-build-2012982-45833/root/chroot_tmpdir/scmroot/nmon
Cloning into '/var/lib/mock/f40-build-2012982-45833/root/chroot_tmpdir/scmroot/nmon'...
$ git fetch origin dd72ca36dcbfaccc40f818ddfd67cab14ac4b7ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nmon
 * [new ref]         dd72ca36dcbfaccc40f818ddfd67cab14ac4b7ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dd72ca3 Update build options