$ git clone -n https://src.fedoraproject.org/rpms/R-formatR.git /var/lib/mock/f45-build-6072-346/root/chroot_tmpdir/scmroot/R-formatR
Cloning into '/var/lib/mock/f45-build-6072-346/root/chroot_tmpdir/scmroot/R-formatR'...
$ git fetch origin a6d32de31cd6df610652ff50aaacff0d0e095fa9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-formatR
 * [new ref]         a6d32de31cd6df610652ff50aaacff0d0e095fa9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6d32de Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild