$ git clone -n https://src.fedoraproject.org/rpms/rust-xcb.git /var/lib/mock/f40-build-2326308-58829/root/chroot_tmpdir/scmroot/rust-xcb
Cloning into '/var/lib/mock/f40-build-2326308-58829/root/chroot_tmpdir/scmroot/rust-xcb'...
$ git fetch origin 463b7fb56e11a34efe8c3d827d3ca2a4ed949440:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-xcb
 * [new ref]         463b7fb56e11a34efe8c3d827d3ca2a4ed949440 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 463b7fb Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild