$ git clone -n https://src.fedoraproject.org/rpms/rust-test-assembler.git /var/lib/mock/f38-build-side-43-rust-devel-1415951-31455/root/chroot_tmpdir/scmroot/rust-test-assembler
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1415951-31455/root/chroot_tmpdir/scmroot/rust-test-assembler'...
$ git fetch origin 8c002303fb1ada907d99b9b8add02948a53e9fbc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-test-assembler
 * [new ref]         8c002303fb1ada907d99b9b8add02948a53e9fbc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c00230 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild