$ git clone -n https://src.fedoraproject.org/rpms/R-servr /var/lib/mock/f39-build-1582293-38109/root/chroot_tmpdir/scmroot/R-servr
Cloning into '/var/lib/mock/f39-build-1582293-38109/root/chroot_tmpdir/scmroot/R-servr'...
$ git fetch origin ada027b2d508c7ac77baf833793b94ab656976d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-servr
 * [new ref]         ada027b2d508c7ac77baf833793b94ab656976d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ada027b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild