$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk-pixbuf-sys0.16.git /var/lib/mock/f38-build-side-43-rust-devel-1412005-31436/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf-sys0.16
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412005-31436/root/chroot_tmpdir/scmroot/rust-gdk-pixbuf-sys0.16'...
$ git fetch origin e0118195cce7d06d8aef119a18edd41d3c067972:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk-pixbuf-sys0.16
 * [new ref]         e0118195cce7d06d8aef119a18edd41d3c067972 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e011819 Initial import (gdk-pixbuf-sys 0.16 compat package)