$ git clone -n https://src.fedoraproject.org/rpms/rust-gdk4_0.6.git /var/lib/mock/f40-build-2712803-72073/root/chroot_tmpdir/scmroot/rust-gdk4_0.6
Cloning into '/var/lib/mock/f40-build-2712803-72073/root/chroot_tmpdir/scmroot/rust-gdk4_0.6'...
$ git fetch origin 8fdedbe335217cb09ebb7802d07a8b7c5a399ec1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gdk4_0.6
 * [new ref]         8fdedbe335217cb09ebb7802d07a8b7c5a399ec1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fdedbe compat package no longer needed