$ git clone -n https://src.fedoraproject.org/rpms/dummy-test-package-crested.git /var/lib/mock/f40-build-1330296-23549/root/chroot_tmpdir/scmroot/dummy-test-package-crested
Cloning into '/var/lib/mock/f40-build-1330296-23549/root/chroot_tmpdir/scmroot/dummy-test-package-crested'...
$ git fetch origin 5563acf47c2872841de61c7ac0b767beb3c8a5ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dummy-test-package-crested
 * [new ref]         5563acf47c2872841de61c7ac0b767beb3c8a5ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5563acf Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild