$ git clone -n https://src.fedoraproject.org/rpms/R-rappdirs.git /var/lib/mock/f39-build-1536176-36264/root/chroot_tmpdir/scmroot/R-rappdirs
Cloning into '/var/lib/mock/f39-build-1536176-36264/root/chroot_tmpdir/scmroot/R-rappdirs'...
$ git fetch origin 1f0da06155591299543757e66d07b9074bcf43c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rappdirs
 * [new ref]         1f0da06155591299543757e66d07b9074bcf43c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f0da06 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild