$ git clone -n https://src.fedoraproject.org/rpms/rust-xz2.git /var/lib/mock/f40-build-2718606-72938/root/chroot_tmpdir/scmroot/rust-xz2
Cloning into '/var/lib/mock/f40-build-2718606-72938/root/chroot_tmpdir/scmroot/rust-xz2'...
$ git fetch origin e1b696d3d474531756dbfeb8593ec1d68cd41dac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-xz2
 * [new ref]         e1b696d3d474531756dbfeb8593ec1d68cd41dac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1b696d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild