$ git clone -n https://github.com/fedora-riscv/rust-proptest.git /var/lib/mock/f38-build-side-42-init-devel-910306-28693/root/chroot_tmpdir/scmroot/rust-proptest
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-910306-28693/root/chroot_tmpdir/scmroot/rust-proptest'...
$ git fetch origin 04553b0c6826cf6818afe7c51af001bdaa61c031:KOJI_FETCH_HEAD
From https://github.com/fedora-riscv/rust-proptest
 * [new ref]         04553b0c6826cf6818afe7c51af001bdaa61c031 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04553b0 Add source code tarball to repo.