$ git clone -n https://src.fedoraproject.org/rpms/arb.git /var/lib/mock/f40-build-2334926-59339/root/chroot_tmpdir/scmroot/arb
Cloning into '/var/lib/mock/f40-build-2334926-59339/root/chroot_tmpdir/scmroot/arb'...
$ git fetch origin 207d6c99a19b4a67f40b292eff20257386d5ee39:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arb
 * [new ref]         207d6c99a19b4a67f40b292eff20257386d5ee39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 207d6c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild