$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk4.git /var/lib/mock/f42-build-side-1-3587390-46931/root/chroot_tmpdir/scmroot/rust-gtk4
Cloning into '/var/lib/mock/f42-build-side-1-3587390-46931/root/chroot_tmpdir/scmroot/rust-gtk4'...
$ git fetch origin 4e65c4508a1c22384e200850ee077e1e947405fb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk4
 * [new ref]         4e65c4508a1c22384e200850ee077e1e947405fb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e65c45 Update to version 0.9.7