$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_path_to_error.git /var/lib/mock/f38-build-side-42-init-devel-1158900-30558/root/chroot_tmpdir/scmroot/rust-serde_path_to_error
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1158900-30558/root/chroot_tmpdir/scmroot/rust-serde_path_to_error'...
$ git fetch origin 1d1eaaabdda06a02a845e7b5d3846530e8e3d68a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_path_to_error
 * [new ref]         1d1eaaabdda06a02a845e7b5d3846530e8e3d68a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1d1eaaa Update to version 0.1.14; Fixes RHBZ#2223143