$ git clone -n https://src.fedoraproject.org/rpms/rust-tracing_chromium.git /var/lib/mock/f40-build-2644108-66496/root/chroot_tmpdir/scmroot/rust-tracing_chromium
Cloning into '/var/lib/mock/f40-build-2644108-66496/root/chroot_tmpdir/scmroot/rust-tracing_chromium'...
$ git fetch origin c4c0e9f4c5cd8e827a7004848730164e00213990:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tracing_chromium
 * [new ref]         c4c0e9f4c5cd8e827a7004848730164e00213990 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4c0e9f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild