$ git clone -n https://src.fedoraproject.org/rpms/rust-predicates-tree.git /var/lib/mock/f41-build-side-1-2785111-32574/root/chroot_tmpdir/scmroot/rust-predicates-tree
Cloning into '/var/lib/mock/f41-build-side-1-2785111-32574/root/chroot_tmpdir/scmroot/rust-predicates-tree'...
$ git fetch origin 84a7503ac7239326dd3e81a1118d02d54b725d64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-predicates-tree
 * [new ref]         84a7503ac7239326dd3e81a1118d02d54b725d64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84a7503 Update to version 1.0.11; Fixes RHBZ#2299893