$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk-pixbuf-sys0.17.git /var/lib/mock/f38-build-side-43-rust-devel-1412184-31439/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf-sys0.17
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412184-31439/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf-sys0.17'...
$ git fetch origin 956820d42397990b0427df41c2218eb7696cf5c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk-pixbuf-sys0.17
 * [new ref]         956820d42397990b0427df41c2218eb7696cf5c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 956820d Initial import (gdk-pixbuf-sys 0.17 compat package)