$ git clone -n https://src.fedoraproject.org/rpms/rust-rtoolbox.git /var/lib/mock/f38-build-side-42-init-devel-761978-27707/root/chroot_tmpdir/scmroot/rust-rtoolbox
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-761978-27707/root/chroot_tmpdir/scmroot/rust-rtoolbox'...
$ git fetch origin 56de9c07116df81f1d3f1f30d6090d0ebf7ad6e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rtoolbox
 * [new ref]         56de9c07116df81f1d3f1f30d6090d0ebf7ad6e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56de9c0 Initial import (#2177398)