$ git clone -n https://src.fedoraproject.org/rpms/rust-gsk4-sys0.6.git /var/lib/mock/f40-build-2681094-67952/root/chroot_tmpdir/scmroot/rust-gsk4-sys0.6
Cloning into '/var/lib/mock/f40-build-2681094-67952/root/chroot_tmpdir/scmroot/rust-gsk4-sys0.6'...
$ git fetch origin 1f35ae3ba6768bb9f697b3b4e03975e9aabc37c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gsk4-sys0.6
 * [new ref]         1f35ae3ba6768bb9f697b3b4e03975e9aabc37c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f35ae3 compat package no longer needed