$ git clone -n https://src.fedoraproject.org/rpms/rust-libcst_derive.git /var/lib/mock/f38-build-side-43-rust-devel-1414496-31448/root/chroot_tmpdir/scmroot/rust-libcst_derive
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1414496-31448/root/chroot_tmpdir/scmroot/rust-libcst_derive'...
$ git fetch origin ac61d288642247d45b22dce2d61fd991f3b74328:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libcst_derive
 * [new ref]         ac61d288642247d45b22dce2d61fd991f3b74328 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac61d28 Initial import (#2239319)