$ git clone -n https://src.fedoraproject.org/rpms/rust-arrayref.git /var/lib/mock/f39-build-1508611-35395/root/chroot_tmpdir/scmroot/rust-arrayref
Cloning into '/var/lib/mock/f39-build-1508611-35395/root/chroot_tmpdir/scmroot/rust-arrayref'...
$ git fetch origin ef0367053939c96bd2c9b2aa770772b38b7b27ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-arrayref
 * [new ref]         ef0367053939c96bd2c9b2aa770772b38b7b27ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef03670 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild