$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-langid-macros-impl.git /var/lib/mock/f38-build-side-42-init-devel-1396137-31050/root/chroot_tmpdir/scmroot/rust-unic-langid-macros-impl
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1396137-31050/root/chroot_tmpdir/scmroot/rust-unic-langid-macros-impl'...
$ git fetch origin 5f6a30abaf8f946b449ffd100ca5d5d810b217da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-langid-macros-impl
 * [new ref]         5f6a30abaf8f946b449ffd100ca5d5d810b217da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f6a30a Update to version 0.9.1; Fixes RHBZ#2136328