$ git clone -n https://src.fedoraproject.org/rpms/nemo-extensions.git /var/lib/mock/f40-build-2077121-49556/root/chroot_tmpdir/scmroot/nemo-extensions
Cloning into '/var/lib/mock/f40-build-2077121-49556/root/chroot_tmpdir/scmroot/nemo-extensions'...
$ git fetch origin 007c9da8573a7b6012c8d278818b5076acbabf30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nemo-extensions
 * [new ref]         007c9da8573a7b6012c8d278818b5076acbabf30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 007c9da Update to 6.0.0 release