$ git clone -n https://src.fedoraproject.org/rpms/rust-gio-sys0.16.git /var/lib/mock/f38-build-side-43-rust-devel-1411943-31436/root/chroot_tmpdir/scmroot/rust-gio-sys0.16
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411943-31436/root/chroot_tmpdir/scmroot/rust-gio-sys0.16'...
$ git fetch origin 9161d0f946ed4273f09c8bf8dbad8461c13fb315:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gio-sys0.16
 * [new ref]         9161d0f946ed4273f09c8bf8dbad8461c13fb315 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9161d0f Initial import (gio-sys 0.16 compat package)