$ git clone -n https://src.fedoraproject.org/rpms/R-geepack.git /var/lib/mock/f45-build-6126-346/root/chroot_tmpdir/scmroot/R-geepack
Cloning into '/var/lib/mock/f45-build-6126-346/root/chroot_tmpdir/scmroot/R-geepack'...
$ git fetch origin 1e907df762d56ad313549db73e6d34cf42fef6d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-geepack
 * [new ref]         1e907df762d56ad313549db73e6d34cf42fef6d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e907df Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild