$ git clone -n https://src.fedoraproject.org/rpms/rust-pore.git /var/lib/mock/f38-build-side-43-rust-devel-1414789-31450/root/chroot_tmpdir/scmroot/rust-pore
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1414789-31450/root/chroot_tmpdir/scmroot/rust-pore'...
$ git fetch origin f647bd34797c59dbd5d78bbb175c39f789814e8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pore
 * [new ref]         f647bd34797c59dbd5d78bbb175c39f789814e8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f647bd3 Rebuild for tokio, h2, and openssl crate security updates