$ git clone -n https://src.fedoraproject.org/rpms/rust-derive_arbitrary.git /var/lib/mock/f39-build-1465990-33634/root/chroot_tmpdir/scmroot/rust-derive_arbitrary
Cloning into '/var/lib/mock/f39-build-1465990-33634/root/chroot_tmpdir/scmroot/rust-derive_arbitrary'...
$ git fetch origin 1140f92dacc98bbfa57eeb422a995466f62c872d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-derive_arbitrary
 * [new ref]         1140f92dacc98bbfa57eeb422a995466f62c872d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1140f92 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild