$ git clone -n https://src.fedoraproject.org/rpms/rust-color-spantrace.git /var/lib/mock/f41-build-side-1-2991750-36005/root/chroot_tmpdir/scmroot/rust-color-spantrace
Cloning into '/var/lib/mock/f41-build-side-1-2991750-36005/root/chroot_tmpdir/scmroot/rust-color-spantrace'...
$ git fetch origin c9988d8a69aa02ed560817568cde83be7edba857:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-color-spantrace
 * [new ref]         c9988d8a69aa02ed560817568cde83be7edba857 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9988d8 Initial import (#2310714)