$ git clone -n https://src.fedoraproject.org/rpms/octave-dicom.git /var/lib/mock/f42-build-3338553-41426/root/chroot_tmpdir/scmroot/octave-dicom
Cloning into '/var/lib/mock/f42-build-3338553-41426/root/chroot_tmpdir/scmroot/octave-dicom'...
$ git fetch origin 98815fae54ba36e14a0f0128b7e85e7d75592a43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-dicom
 * [new ref]         98815fae54ba36e14a0f0128b7e85e7d75592a43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98815fa feat: update to 0.6.1 (fix rh#2299770)