$ git clone -n https://src.fedoraproject.org/rpms/rust-sval_json.git /var/lib/mock/f39-build-1517271-35708/root/chroot_tmpdir/scmroot/rust-sval_json
Cloning into '/var/lib/mock/f39-build-1517271-35708/root/chroot_tmpdir/scmroot/rust-sval_json'...
$ git fetch origin a870eb5ec3eedf220d2626ac62e57f0a84a232d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sval_json
 * [new ref]         a870eb5ec3eedf220d2626ac62e57f0a84a232d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a870eb5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild