$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk3-macros0.16.git /var/lib/mock/f38-build-side-43-rust-devel-1413565-31444/root/chroot_tmpdir/scmroot/rust-gtk3-macros0.16
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413565-31444/root/chroot_tmpdir/scmroot/rust-gtk3-macros0.16'...
$ git fetch origin e06d5184cb2c4fa7b2f84d145678ce9da45d90b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk3-macros0.16
 * [new ref]         e06d5184cb2c4fa7b2f84d145678ce9da45d90b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e06d518 Update to version 0.16.3