$ git clone -n https://src.fedoraproject.org/rpms/octave-symbolic.git /var/lib/mock/f41-build-side-1-2965723-35796/root/chroot_tmpdir/scmroot/octave-symbolic
Cloning into '/var/lib/mock/f41-build-side-1-2965723-35796/root/chroot_tmpdir/scmroot/octave-symbolic'...
$ git fetch origin 23dc9dac331edc6dcf966032a31000d07fd88fea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-symbolic
 * [new ref]         23dc9dac331edc6dcf966032a31000d07fd88fea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23dc9da fix %files section