$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_ref.git /var/lib/mock/f39-build-1543917-36599/root/chroot_tmpdir/scmroot/rust-sval_ref
Cloning into '/var/lib/mock/f39-build-1543917-36599/root/chroot_tmpdir/scmroot/rust-sval_ref'...
$ git fetch origin a7e1fe2c48e1afee1f58d80afb29c9663f737b8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_ref
 * [new ref]         a7e1fe2c48e1afee1f58d80afb29c9663f737b8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7e1fe2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild