$ git clone -n https://src.fedoraproject.org/rpms/rust-gtk4_0.8.git /var/lib/mock/f42-build-side-1-3511132-46047/root/chroot_tmpdir/scmroot/rust-gtk4_0.8
Cloning into '/var/lib/mock/f42-build-side-1-3511132-46047/root/chroot_tmpdir/scmroot/rust-gtk4_0.8'...
$ git fetch origin 376e3c27535f62065f62f59bd5c4bc90ab261257:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gtk4_0.8
 * [new ref]         376e3c27535f62065f62f59bd5c4bc90ab261257 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 376e3c2 compat package no longer needed