$ git clone -n https://src.fedoraproject.org/rpms/R-roxygen2 /var/lib/mock/f39-build-1596545-38383/root/chroot_tmpdir/scmroot/R-roxygen2
Cloning into '/var/lib/mock/f39-build-1596545-38383/root/chroot_tmpdir/scmroot/R-roxygen2'...
$ git fetch origin f91cbc71177e9554a3dda91a17f32734f1fa7cd9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-roxygen2
 * [new ref]         f91cbc71177e9554a3dda91a17f32734f1fa7cd9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f91cbc7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild