$ git clone -n https://src.fedoraproject.org/rpms/octave-dicom.git /var/lib/mock/f38-build-side-42-init-devel-1299933-30684/root/chroot_tmpdir/scmroot/octave-dicom
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1299933-30684/root/chroot_tmpdir/scmroot/octave-dicom'...
$ git fetch origin b707d690bfaf6b75e13308c08475d37dfb45511d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-dicom
 * [new ref]         b707d690bfaf6b75e13308c08475d37dfb45511d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b707d69 Update to 0.5.1