$ git clone -n https://src.fedoraproject.org/rpms/octave-datatypes.git /var/lib/mock/f45-build-20864-574/root/chroot_tmpdir/scmroot/octave-datatypes
Cloning into '/var/lib/mock/f45-build-20864-574/root/chroot_tmpdir/scmroot/octave-datatypes'...
$ git fetch origin 5e6aaa00baf4c3cb500568519372dfa552d2a92f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-datatypes
 * [new ref]         5e6aaa00baf4c3cb500568519372dfa552d2a92f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e6aaa0 Update to 1.3.1 upstream release