$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk4-sys /var/lib/mock/f42-build-3429032-45391/root/chroot_tmpdir/scmroot/rust-gtk4-sys
Cloning into '/var/lib/mock/f42-build-3429032-45391/root/chroot_tmpdir/scmroot/rust-gtk4-sys'...
$ git fetch origin 98b61d3f51cc6de7e95f355866b13e6e66544ccf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk4-sys
 * [new ref]         98b61d3f51cc6de7e95f355866b13e6e66544ccf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 98b61d3 Update to version 0.9.6; Fixes RHBZ#2345990