$ git clone -n https://src.fedoraproject.org/rpms/rust-gsk4-sys0.8.git /var/lib/mock/f42-build-side-1-3589329-46957/root/chroot_tmpdir/scmroot/rust-gsk4-sys0.8
Cloning into '/var/lib/mock/f42-build-side-1-3589329-46957/root/chroot_tmpdir/scmroot/rust-gsk4-sys0.8'...
$ git fetch origin 8ced19ebd280bd3c4fbd9b5029c307b2b84f79ff:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gsk4-sys0.8
 * [new ref]         8ced19ebd280bd3c4fbd9b5029c307b2b84f79ff -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ced19e compat package no longer needed