$ git clone -n https://src.fedoraproject.org/rpms/rust-json5.git /var/lib/mock/f39-build-1521896-35867/root/chroot_tmpdir/scmroot/rust-json5
Cloning into '/var/lib/mock/f39-build-1521896-35867/root/chroot_tmpdir/scmroot/rust-json5'...
$ git fetch origin 990836f245a93413fc0b0b7f479f66b314891289:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-json5
 * [new ref]         990836f245a93413fc0b0b7f479f66b314891289 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 990836f Regenerate with rust2rpm v24