$ git clone -n https://src.fedoraproject.org/rpms/rust-gio0.16.git /var/lib/mock/f38-build-side-43-rust-devel-1411900-31436/root/chroot_tmpdir/scmroot/rust-gio0.16
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411900-31436/root/chroot_tmpdir/scmroot/rust-gio0.16'...
$ git fetch origin 3c5e6ac54e55913d64b39a79ea4348d92b87e136:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gio0.16
 * [new ref]         3c5e6ac54e55913d64b39a79ea4348d92b87e136 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c5e6ac Initial import (gio 0.16 compat package)