$ git clone -n https://src.fedoraproject.org/rpms/rust-lddtree.git /var/lib/mock/f41-build-side-1-3107949-39380/root/chroot_tmpdir/scmroot/rust-lddtree
Cloning into '/var/lib/mock/f41-build-side-1-3107949-39380/root/chroot_tmpdir/scmroot/rust-lddtree'...
$ git fetch origin b60e8977ca82c5dc9faa59b5611bc0b9c651cb9f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lddtree
 * [new ref]         b60e8977ca82c5dc9faa59b5611bc0b9c651cb9f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b60e897 Update to version 0.3.6; Fixes RHBZ#2322730