$ git clone -n https://src.fedoraproject.org/rpms/rubygem-multi_test.git /var/lib/mock/f39-build-1499370-34744/root/chroot_tmpdir/scmroot/rubygem-multi_test
Cloning into '/var/lib/mock/f39-build-1499370-34744/root/chroot_tmpdir/scmroot/rubygem-multi_test'...
$ git fetch origin 1eb4e22be2607b9b87765c24cdc106fb10677024:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-multi_test
 * [new ref]         1eb4e22be2607b9b87765c24cdc106fb10677024 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1eb4e22 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild