$ git clone -n https://src.fedoraproject.org/rpms/cstream.git /var/lib/mock/f40-build-2692874-68269/root/chroot_tmpdir/scmroot/cstream
Cloning into '/var/lib/mock/f40-build-2692874-68269/root/chroot_tmpdir/scmroot/cstream'...
$ git fetch origin 4d057310c6e9df5e0f86eec6b17c62051a1ffa25:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cstream
 * [new ref]         4d057310c6e9df5e0f86eec6b17c62051a1ffa25 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d05731 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild