$ git clone -n https://src.fedoraproject.org/rpms/rust-graphene-sys0.17.git /var/lib/mock/f40-build-2713151-72116/root/chroot_tmpdir/scmroot/rust-graphene-sys0.17
Cloning into '/var/lib/mock/f40-build-2713151-72116/root/chroot_tmpdir/scmroot/rust-graphene-sys0.17'...
$ git fetch origin abbd5762ad6ccc1ece2817ec8903940a248bd4e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-graphene-sys0.17
 * [new ref]         abbd5762ad6ccc1ece2817ec8903940a248bd4e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at abbd576 compat package no longer needed