$ git clone -n https://src.fedoraproject.org/rpms/octave.git /var/lib/mock/f45-build-39934-765/root/chroot_tmpdir/scmroot/octave
Cloning into '/var/lib/mock/f45-build-39934-765/root/chroot_tmpdir/scmroot/octave'...
$ git fetch origin 9a145224763d4712e93a14caa6215228fbd3ff86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave
 * [new ref]         9a145224763d4712e93a14caa6215228fbd3ff86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a14522 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild