$ git clone -n https://src.fedoraproject.org/rpms/netdata.git /var/lib/mock/f40-build-2703697-70848/root/chroot_tmpdir/scmroot/netdata
Cloning into '/var/lib/mock/f40-build-2703697-70848/root/chroot_tmpdir/scmroot/netdata'...
$ git fetch origin 1f5ac1a1293dc894115f0b1f95365488a75937d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/netdata
 * [new ref]         1f5ac1a1293dc894115f0b1f95365488a75937d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f5ac1a Update to upstream release 1.45.2