$ git clone -n https://src.fedoraproject.org/rpms/osc-source_validator.git /var/lib/mock/f39-build-1461658-33273/root/chroot_tmpdir/scmroot/osc-source_validator
Cloning into '/var/lib/mock/f39-build-1461658-33273/root/chroot_tmpdir/scmroot/osc-source_validator'...
$ git fetch origin c45799acf982d9d80718eb031d7d4c984b11fadc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/osc-source_validator
 * [new ref]         c45799acf982d9d80718eb031d7d4c984b11fadc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c45799a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild