$ git clone -n https://src.fedoraproject.org/rpms/rust-lddtree.git /var/lib/mock/f45-build-42878-797/root/chroot_tmpdir/scmroot/rust-lddtree
Cloning into '/var/lib/mock/f45-build-42878-797/root/chroot_tmpdir/scmroot/rust-lddtree'...
$ git fetch origin ea43a0f41a9e8d9602b56f82e6afb348a4a1a37e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lddtree
 * [new ref]         ea43a0f41a9e8d9602b56f82e6afb348a4a1a37e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea43a0f Update to version 0.5.1; Fixes RHBZ#2425801