$ git clone -n https://src.fedoraproject.org/rpms/nagios.git /var/lib/mock/f40-build-755908-118358/root/chroot_tmpdir/scmroot/nagios
Cloning into '/var/lib/mock/f40-build-755908-118358/root/chroot_tmpdir/scmroot/nagios'...
$ git fetch origin 17bb18eadb37449d466e59497981ce848ea52dd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nagios
 * [new ref]         17bb18eadb37449d466e59497981ce848ea52dd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17bb18e Update to 4.4.14