$ git clone -n https://src.fedoraproject.org/rpms/R-R.methodsS3.git /var/lib/mock/f45-build-5894-345/root/chroot_tmpdir/scmroot/R-R.methodsS3
Cloning into '/var/lib/mock/f45-build-5894-345/root/chroot_tmpdir/scmroot/R-R.methodsS3'...
$ git fetch origin d7022c8b05b5aadbb8ea8ede1fc137618bc30a4c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-R.methodsS3
 * [new ref]         d7022c8b05b5aadbb8ea8ede1fc137618bc30a4c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7022c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild