$ git clone -n https://src.fedoraproject.org/rpms/octave-dicom.git /var/lib/mock/f45-build-20842-574/root/chroot_tmpdir/scmroot/octave-dicom
Cloning into '/var/lib/mock/f45-build-20842-574/root/chroot_tmpdir/scmroot/octave-dicom'...
$ git fetch origin 644c2533f04d8503ce75faa686587d24c346f7de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-dicom
 * [new ref]         644c2533f04d8503ce75faa686587d24c346f7de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 644c253 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild