$ git clone -n https://src.fedoraproject.org/rpms/rust-atomic-polyfill0.1.git /var/lib/mock/f39-build-1539034-36411/root/chroot_tmpdir/scmroot/rust-atomic-polyfill0.1
Cloning into '/var/lib/mock/f39-build-1539034-36411/root/chroot_tmpdir/scmroot/rust-atomic-polyfill0.1'...
$ git fetch origin ef7c8aa57c06bfd5d2bf42eb9a01349a54bcb72a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-atomic-polyfill0.1
 * [new ref]         ef7c8aa57c06bfd5d2bf42eb9a01349a54bcb72a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef7c8aa Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild