$ git clone -n https://src.fedoraproject.org/rpms/R-servr.git /var/lib/mock/f40-build-2270422-54815/root/chroot_tmpdir/scmroot/R-servr
Cloning into '/var/lib/mock/f40-build-2270422-54815/root/chroot_tmpdir/scmroot/R-servr'...
$ git fetch origin b4da30a8f7144efa0d2c2b5a49ea9cea83cff600:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-servr
 * [new ref]         b4da30a8f7144efa0d2c2b5a49ea9cea83cff600 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4da30a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild