$ git clone -n https://src.fedoraproject.org/rpms/rust-ruzstd.git /var/lib/mock/f39-build-2003847-44877/root/chroot_tmpdir/scmroot/rust-ruzstd
Cloning into '/var/lib/mock/f39-build-2003847-44877/root/chroot_tmpdir/scmroot/rust-ruzstd'...
$ git fetch origin da6309f0b4d76f82175365b2021db0771ad52a0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ruzstd
 * [new ref]         da6309f0b4d76f82175365b2021db0771ad52a0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da6309f Initial import (#2252142)