$ git clone -n https://src.fedoraproject.org/rpms/xtensor.git /var/lib/mock/f40-build-2046280-48857/root/chroot_tmpdir/scmroot/xtensor
Cloning into '/var/lib/mock/f40-build-2046280-48857/root/chroot_tmpdir/scmroot/xtensor'...
$ git fetch origin 7e72ec555dca78e32ffa7b87f7c6f44830c92a68:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xtensor
 * [new ref]         7e72ec555dca78e32ffa7b87f7c6f44830c92a68 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e72ec5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild