$ git clone -n https://src.fedoraproject.org/rpms/rust-string_cache.git /var/lib/mock/f40-build-2658175-66917/root/chroot_tmpdir/scmroot/rust-string_cache
Cloning into '/var/lib/mock/f40-build-2658175-66917/root/chroot_tmpdir/scmroot/rust-string_cache'...
$ git fetch origin d1f3cedcb1059d86988cdbcf913914af39a0f61a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-string_cache
 * [new ref]         d1f3cedcb1059d86988cdbcf913914af39a0f61a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1f3ced Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild