$ git clone -n https://src.fedoraproject.org/rpms/guava.git /var/lib/mock/f38-build-side-42-init-devel-608617-26258/root/chroot_tmpdir/scmroot/guava
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-608617-26258/root/chroot_tmpdir/scmroot/guava'...
$ git fetch origin 0b9c27e729f637c952adf266d5bd4218b24b9ec2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/guava
 * [new ref]         0b9c27e729f637c952adf266d5bd4218b24b9ec2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b9c27e Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild