$ git clone -n https://src.fedoraproject.org/rpms/R-bitops.git /var/lib/mock/f39-build-1470441-33896/root/chroot_tmpdir/scmroot/R-bitops
Cloning into '/var/lib/mock/f39-build-1470441-33896/root/chroot_tmpdir/scmroot/R-bitops'...
$ git fetch origin c5c18c6d1ef795c26d86e29d51f649355d5364f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-bitops
 * [new ref]         c5c18c6d1ef795c26d86e29d51f649355d5364f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5c18c6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild