$ git clone -n https://src.fedoraproject.org/rpms/xxhash.git /var/lib/mock/f40-build-786723-134501/root/chroot_tmpdir/scmroot/xxhash
Cloning into '/var/lib/mock/f40-build-786723-134501/root/chroot_tmpdir/scmroot/xxhash'...
$ git fetch origin 2a314824c7f929347032d4858b227e6f3ec6f28c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xxhash
 * [new ref]         2a314824c7f929347032d4858b227e6f3ec6f28c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a31482 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild