$ git clone -n https://src.fedoraproject.org/rpms/R-lmodel2.git /var/lib/mock/f45-build-6208-347/root/chroot_tmpdir/scmroot/R-lmodel2
Cloning into '/var/lib/mock/f45-build-6208-347/root/chroot_tmpdir/scmroot/R-lmodel2'...
$ git fetch origin b93797f84294a7e222fb65f19c49b13311227ba3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-lmodel2
 * [new ref]         b93797f84294a7e222fb65f19c49b13311227ba3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b93797f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild