$ git clone -n https://src.fedoraproject.org/rpms/R-dichromat.git /var/lib/mock/f45-build-6211-347/root/chroot_tmpdir/scmroot/R-dichromat
Cloning into '/var/lib/mock/f45-build-6211-347/root/chroot_tmpdir/scmroot/R-dichromat'...
$ git fetch origin 918084272f920776e880e0fe5d9b38cef1601ce2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-dichromat
 * [new ref]         918084272f920776e880e0fe5d9b38cef1601ce2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9180842 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild