$ git clone -n https://src.fedoraproject.org/rpms/rarian.git /var/lib/mock/f40-build-2321042-58524/root/chroot_tmpdir/scmroot/rarian
Cloning into '/var/lib/mock/f40-build-2321042-58524/root/chroot_tmpdir/scmroot/rarian'...
$ git fetch origin ea998c80923198b7ff60f415e6a64819fb4bfec9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rarian
 * [new ref]         ea998c80923198b7ff60f415e6a64819fb4bfec9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea998c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild