$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk0.17.git /var/lib/mock/f38-build-side-43-rust-devel-1421133-31465/root/chroot_tmpdir/scmroot/rust-gtk0.17
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1421133-31465/root/chroot_tmpdir/scmroot/rust-gtk0.17'...
$ git fetch origin 8704a8b38ce42d1412b8b00eb7d51e52afb85418:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk0.17
 * [new ref]         8704a8b38ce42d1412b8b00eb7d51e52afb85418 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8704a8b Initial import (gtk 0.17 compat package)